She's six months pregnant with her first child, but The Saturdays singer Una Healy isn't ready to change into billowing maternitywear any time soon.
The Irish pop star, 30, still looked as sexy as her bandmates as she performed in a gold mini dress at the Capital FM Jingle Bell Ball in London tonight.
Joining Rochelle Wiseman, Mollie King, Frankie Sandford and Vanessa White on the red carpet, she proudly showed off her growing bump in her shimmering number.
A Jingle Bell smock? The Saturdays singer Una Healy shows off her growing bump in a gold mini-dress at the Capital FM Jingle Bell Ball at London's O2 Arena
All fired up: Una joined her bandmates (L-R) Mollie King, Rochelle Wiseman, Frankie Sandford and Vanessa White on stage
She complemented her bandmates, who were all dressed in gold and white creations to get into the Christmas spirit.
Blonde King, 24, showed off her tanned legs in a bottom-skimming white mini-skirt and gold sequinned top, while Sandford, 22, flaunted her toned figure in a white cut-out dress.
The fivesome performed hits from past and present albums, including Higher, Notorious, Ego, My Heart Takes Over, Forever Is Over and All Fired Up.
Busy: The girl group travelled down from Liverpool on Sunday specially for their performance at the Jingle Bell Ball
Charlie's Angels: The group put on quite a few poses as they worked the stage
Ahead of the Jingle Bell Ball, the group travelled 230 miles after performing at the Echo Arena in Liverpool last night as part of their All Fired Up tour.
Despite being pregnant, Healy hasn't let her expectant state slow her down during rehearsals over the past few weeks.
Mollie said last week: 'Una is such a trouper, she hasn’t missed one rehearsal. We can’t hold her down. There’s no sit-down or wheelchair for her. We’re all up there busting a move.'
Back in the fold: Sandford is enjoying being back in the group after taking time off for health reasons
Glam: The group looked suitably festive in their white and gold outfits
And Una admitted she's been loving the attention on her bump and doesn't even mind when people touch it.
She said: 'It's quite a loving thing. You feel it's because they know it's quite a special thing going on in there. I know some people get freaked out by it, but I like it.'
While The Saturdays looked festive in their gold and white, their contemporary Jessie J wasn't quite into the Christmas spirit yet when it came to her wardrobe.
That's not very festive: Jessie J wore shorts and a floor-length cardigan to the ball
The singer, 23, wore a pair of black shorts, T-shirt and floor-length black cardigan as she arrived on the red carpet.
The annual Capital FM Jingle Bell Ball was hosted by Lisa Snowdon, who presents the station's breakfast show.
She recently lost her partner-in-crime Johnny Vaughan, who is being replaced by Dave Berry.
Also performing at the gig were X Factor boy bands JLS and One Direction.
Their sets came as they hit the No.1 spot in the UK singles chart with this year's X Factor finalists with Wishing On A Star.
The boys are back in town; JLS - who are the new No.1 with the X Factor finalists - were greeted by screaming fans
Tween idols: One Direction (L-R) Liam Payne, Louis Tomlinson, Harry Styles, Zayn Malik and Niall Horan wowed the crowd
They seem All Fired Up for their impending tour and judging from rehearsals they will be raising temperatures too.
The Saturdays got one final practice in before packing their bags for the groups first ever arena tour.
Taking inspiration from Father Christmas and his big red suit, the girls have a segment of the show where they dress up in some very sultry outfits.
Merry Christmas: The Saturdays rehearse for their arena tour in some festive costumes
Appearing on stage in red sequined jackets they give a whole new meaning to the phrase 'naughty and nice.'
The girls have been performing dress rehearsals for their first ever arena tour and have been feeling nervous about the experience.
Rochelle Wiseman said: 'The thought that we are about to take on arenas sends a shiver down my spine.
All wrapped up: Mollie King and Frankie Sandford add some sugar and spice to the concert
'It's everything we've ever dreamed of as a band,' she added.
The Saturdays, who have had nine Top 10 singles, have been practising singing new songs on their tour from their as yet unnamed fourth studio album.
Fans can expect a lot of bright colours and brightly coloured costumes as the group whip off their Christmas clothes and change into skimpy outfits.
Together again: Una Healy sings solo while Mollie and Frankie get closer to each other
Under the spotlight: Rochelle Wiseman and Frankie go through the motions
All that glitters: Short silver dresses were worked into the routine with Una's being a looser fitting than the rest
Mollie King can be seen dancing around wearing a pair of very short blue denim pants with a torn white vest and fishnet stockings.
The blonde singer then changes again into a sparkly silver and black mini dress.
In one routine Frankie Sandford, who has recently returned to the band after suffering from illness, flashes her red bra through a pink halter neck top which she teemed with a pair of black high-waisted shorts.
Ready to work: The Saturdays arrive on stage in a large elevator
We salute you: The girl group strike a pose in their sultry office worker costumes
The ladies also dress up as sexy secretaries and make a grand entrance via a large silver lift.
Kitted out in glasses, high heels, pencil skirts and bright bras they arrive on stage and strike a pose before starting to sing.
Una Healy tweeted about her excitement today and said: 'First night of our #AllFiredUpTour tonight in Bournemouth!! Sooo excited! The butterflies have set in! Get Ready, Get Set! Who's coming?Xxx.'
Less is clearly more: Mollie and Frankie show off some revealing outfits in the run-through
Corset girls: The ladies have brought plenty of variation and colour for their first ever arena tour
Rochelle, meanwhile, was feeling exhausted from all the preparation and said on Twitter: 'Just got back to my hotel room after a long day rehearsing on our arena stage eekkk! Its all coming together nicely! I am soooo excited :) x.'
Their 13 date tour will take the girls to Scotland, Northern Ireland and Wales as well as England and pregnant Una will be taking a special something with her for the ride.
She said: 'Having my pillow from home with me on tour is the closest thing to bringing my own bed on tour!'
Hot stuff: A pregnant Una and a slim looking Mollie dance on stage in matching fishnet tights
Earlier this year, Rochelle Wiseman hit the headlines with her slimmer figure.
After previously being unfairly subjected to 'fat' taunts online, when she was clearly a healthy size 10, many thought The Saturdays singer had been feeling the pressure to lose weight.
But in actual fact, the 22-year-old admitted her slimmer weight was her actual size and a health problem had led to pile on the pounds last year.
Changing shape: A slimmer Rochelle Wiseman earlier this year (left) and looking curvier (right) around the time of her health troubles
Speaking about her health scare for the first time, Wiseman admitted she had an operation when doctors discovered a cyst on her ovary.
She tells the latest issue of New! magazine: 'I had an operation at the start of last year. I had a cyst on my ovary and it made me put on a lot of weight.
'I went a full dress size bigger - from a size 8 up to a 10, maybe even a 12. Everyone thinks I’ve tried to lose weight, but I genuinely haven’t.'
Last year, the outspoken star took to Twitter to hit back at critics of her figure.
Glam squad: Wiseman and her Saturdays bandmates (L-R) Frankie Sandford, Una Healy, Vanessa White and Mollie King at the GQ Men Of The Year Awards
She said: 'I'm really getting annoyed reading that people are calling me fat! I'm a size 10 not 100! I'm human and curvy get over it! It's boring!
'I'm just starting to get sick of it!!! No wonder people get a complex!! I think it's a disgrace!!
'As a band we take pride in being role models to children and other young girls and I think that the best role model is someone who is comfortable in their own skin! And I am.'
Meanwhile, Wiseman reflected on her two month split from JLS singer boyfriend Marvin Humes.
The couple started dating in March 2010, but called time on their romance the following November.
But by January this year, the pair were back together and are now stronger than ever.
She explains: 'We’ve been together two years and I think everyone has a stage when something like that happens. It’s not a big deal.
'We got back together because I think we realised that we didn’t want to let go of what we had.'
The full interview with Wiseman is in the new issue of New! magazine, on sale now.
With just six competitors left, the competition is getting serious on the X Factor.
So on tonight's episode, the remaining contestants really upped their games, delivering some of the best performances of the season.
Standing out, though, was Little Mix, who appear to have well and truly broken the 'curse of the girl groups' and are emerging as hot favourites to win the competition.
Breaking the girl group curse: Little Mix dazzled on tonight's X Factor with their powerful performance of En Vogue's Don't Let Go from the film Set It Off
Big things to come: The judges told Perrie, Jesy, Jade and Leigh-Anne that they could be the 'biggest girl band to come out of the UK'
The four-piece, who drew criticism last week for sticking to their 'pop/hip hop' genre, changed things up with a powerful vocal performance of En Vogue's Don't Let Go.
The girls, dressed in matching monochrome outfits, received a standing ovation for the performance, which Gary said was their best yet.
'We're looking at the next great girl band in the UK,' Louis enthused, barely audible over the cheering.
Girl band advice: Earlier int he week Little Mix attended The Saturdays' tour rehearsals, where the group told them to cherish their friendship first
Star power: The girls also attended the Twilight premiere with the rest of the contestants
Every tween's dream: But they were the only ones to get a shout out from Taylor Lautner
Kelly added: 'Everything I've wanted from you girls for the past few weeks, you just gave me. I think you'll be the biggest girl band to ever come out of the UK.'
Gary asked the girls to 'strip things back' next week to really show that they can rely on simply their vocal talent.
It was an exciting few days for Little Mix in between rehearsals. The group got to meet The Saturdays during their tour rehearsals, who advised them to cherish their friendship and it will show on stage.
Later in the week they were shown attending the Twilight: Breaking Dawn premiere, where Taylor Lautner sent them a shout out over the VT.
Fashion factor: Kelly looked gorgeous in a white gown with multi-coloured embellishment by Sass & Bide, while Tulisa rocked a short black frock
Awkward: Darmot's cringe-worthy dance routine to kick off a 'Night at the Movies' immediately set the phrase 'Oh Dermot' trending on Twitter
Earlier, the host Dermot O'Leary kicked off 'A Night at the Movies' with a comical routine with some scantily-clad backing dancers, immediately setting the phrase, 'Oh Dermot' trending on Twitter.
Both the female judges looked gorgeous as ever, Tulisa in a short black frock while Kelly dazzled in a floor-length Sass & Bide white gown with multi-coloured embellishment.
Craig Colton was first to hit the stage, with the classic 007 tune License to Kill. But while no one could fault his vocals, the song choice was ravaged.
License to thrill: Craig Colton kicked off proceedings with License to Kill from James Bond
'This is a singing competition not a song choice competition': Gary was furious with Tulisa and Louis' comments about his song choice
Louis said: 'I don't think it was a great song choice, you're better than that.' Tulisa agreed, saying it was 'predictable.'
'You always deliver vocally,' Kelly said, struggling to find any constructive criticism, only suggesitng he 'bring a little more.'
'This is lazy critique from the judges tonight,' said a furious Gary. 'This is a singing competition not a song choice competition.'
Janet Devlin took on board the judges comments from last week, by going slightly more up-tempo with her rendition of 'Kiss Me' from How to Love a Guy in Ten Days.
Romantic: Janet sang 'Kiss Me' from How to Lose a Guy in Ten Days
Who said I was boring? The Irish redhead changed things up after last week's comments, performing a more uptempo tune, and was rewarded with excellent reviews from the judges
The judges and audience adored the romantic performance.
'I am so happy to see you back in your comfort zone,' said Tulisa, advising her to pull an 'epic' song out of the bag for next week.
Gary, who called her 'bordering on boring' last week, told Janet that he loved her performance.
Amelia Lily was up next, dazzling with 'Think' from Bridget Jones' Diary, however Tulisa admitted she didn't know the classic Aretha Franklin song.
Back with a bang: Amelia Lily dazzled with her performance of Think from Bridget Jones' diary
Think pink: Amelia nailed the classic Aretha Franklin tune, despite Tulisa admitting she'd never heard of it
Girl time: Amelia and Kelly were shown bonding with a spa day after five weeks apart
Gary said he thought it was performed an octave too high for her range and that she rushed in parts, but all in all the judges loved the performance
After the ad break, Dermot found David Walliams and Lara Stone in the audience. Walliams pleaded for Johnny to be let back in, but said he was also rooting for Little Mix.
Next up was Misha B, who belted out Whitney Houston's Oscar-nominated I Have Nothing from The Bodyguard.
Powerful: Misha B belted out Whitney Houston's Oscar-nominated I Have Nothing from The Bodyguard
Soul diva: Wearing a stunning white gown with feathered shoulders, Misha broke down in tears following her song, which received a standing ovation from Kelly
Wearing a stunning white gown with feathered shoulders, Misha broke down in tears following her performance, which received a standing ovation from Kelly.
'You blew me away,' Tulisa said. 'That was a beautiful performance.'
'I was so sad the last two weeks when you were in the bottom two,' said Gary. 'I completely disagree with everyone watching this show, I can't believe no one is voting for you. The disappointing thing is that its affecting your performances and your song choices.'
Overcome: Gary told the emotional singer that he though that being in the bottom two for two weeks had made give 'safe' performances and that he wanted to see 'the old Misha' back on stage
Emotional: Misha, who is adopted, had earlier bonded with mentor Kelly after being contacted by her birth mother
He explained: 'I feel like you're being too safe. I want Misha B back. And if you have to go out like that, so what? Go out with your integrity.'
It had been an emotional week for Misha, whose birth mother wrote an open letter to her daughter, published in a magazine.
The singer was comforted by an equally emotional Kelly, who told her about her own experiences being contacted by her absent father following fame.
Finally, Marcus closed the show, performing Otis Redding’s (Your Love Has Lifted Me) Higher and Higher from Ghostbusters.
A word of advice: Last year's runner-up Rebecca Ferguson visited Marcus during the week
Energetic: Marcus performed Otis Redding’s (Your Love Has Lifted Me) Higher and Higher from Ghostbusters
The judges called it one of the best performances of the show, placing Marcus level with Little Mix.
'The little man from Liverpool with the big soulful voice,' enthused Louis. 'Every week you bring it.'
'Marcus, that's what movie week is all about,' said Tulisa. 'Can I just say, Marcus is baaaack!'
Kelly retorted: 'Marcus has been here and he has raised the building.'
Gary called it the 'performance of the night. No other contestant has improved the way you have week after week.'
Rising star: Marcus is also becoming a favourite to end up in the finals
Meanwhile axed Frankie Cocozza wrote on Twitter that it felt odd to be watching the show from home. 'Strange watching x factor, glad everyone done so well #teambarlow' he tweeted.
On tomorrow night's results show Rihanna and last year's runner-up Rebecca Ferguson, who made a cameo in tonight's episode, will perform.
As of next week, the final five contestants will be performing two songs each.
She's been waylaid with a mystery illness since September and Frankie Sanford still isn't well enough to appear with the Saturdays full-time.
Yesterday the 22-year-old remained absent from the group's public engagements including appearances on Daybreak and Channel 4's Album Chart Show.
However, she is getting involved with rehearsals for their upcoming tour, which kicks off in just two week's time.
Still struggling: Frankie Sandford is only permitted to attend tour rehearsals with The Saturdays but she's been advised to rest up and avoid overdoing it
Here I am: The singer has been out of action since picking up a mystery illness two months ago
In a statement, the band's press representative told the MailOnline: 'Frankie is still ill and she's taking her time to recover. under doctor's orders she is only permitted to attend tour rehearsals.
'She's easing herself back in to things with the group but will be appearing on the tour which starts at the end of this month.'
Yesterday the rest of the group, Rochelle Wiseman, Una Healy, Mollie King and Vanessa White kept up their pre-tour publicity trail with appearances on both Channel 4 and ITV.
On great form: Mollie King and pregnant Una Healy both looked great as they made their way out of rehearsals
Shady lady: Rochelle exits rehearsals with her eyes covered by a large pair of sunglasses
On Sunday Frankie had been up late, using her Twitter page to have a live 'webchat' with her followers, it's presumed she spent the early part of Monday resting up as she was absent from the group's television appearances.
Later that day however they were joined by Frankie at rehearsals in London.
The girls were all immaculately turned out as they left the studios where they have been practicing routines.
Still missing: Frankie Sandford (L) had two months off due to a mystery illness but was absent again today when the group performed on Daybreak
Frankie wore a colour-coordinated outfit featuring a pair of red jeans, with black trainers and a black jacket.
Underneath she wore a blue/grey hooded top and she carried a large black bag, covering her neck with a red and black scarf.
Rochelle, 22, wore a pair of PVC trousers, with a sheer burgundy top which exposed her white bra underneath.
What illness: Frankie Sandford looked happy as she went shopping with Wayne Bridge at Harrods last month
She matched the items with a grey coat and a burgundy to match her top.
Mollie King, 24, looked rather quaint in her green shorts, blue coat and matching hat.
She accessorised with a pair of fur-lined boots, a red box bag and a checked scarf.
Pregnant Una Healy looked more like a businesswoman than a pop star in her understated outfit.
The 30-year-old went for a chic blazer jacket, a white top with black hearts printed all over it and a black pencil skirt.
The girls debuted their new dancers and some new songs on the Album Chart Show, Una excitedly tweeted about their new routines.
She wrote: 'Album Chart show with our dancers performing songs from our new album really gets me excited for our upcoming tour! See you guys there!!'
The Saturdays have a new album due on November 21, entitled On Your Radar and their tour supporting the album begins in Bournemouth on December 2, finishing up at Wembley Arena in London on December 16.
