Not such a dirty 30 then? Kimberley Walsh looks remarkably fresh-faced after she leaves her landmark birthday party

By Emily Sheridan

Last updated at 1:32 PM on 20th November 2011

Celebrating her landmark 30th birthday, pop star Kimberley Walsh could be forgiven for going wild.

But it appears the Girls Aloud singer isn't quite the party animal she once was and looked remarkably fresh-faced and perky as she headed home from her own party.

Joined by long-term boyfriend Justin Scott and bandmate Nicola Roberts, the Yorkshire lass looked stunning in a strapless nude prom dress as she partied at the Westbury Hotel in London's Mayfair.

Looking respectable: Kimberley Walsh looks remarkably perky as she leaves her 30th birthday party at the Westbury Hotel with boyfriend Justin Scott last night

But perhaps after weeks of treading the boards in Shrek: The Musical on a nightly basis, perhaps Walsh wanted to take things easy.

Although leopard-print Roberts, 26, attended with boyfriend Charlie Fennell, the rest of Walsh's Girls Aloud bandmates were noticeably absent.

Cheryl Cole, 28, was originally expected to attend, but is currently ill with pharyngitis.

Who's got the highest heels? Walsh was joined at her party by Girls Aloud bandmate Nicola Roberts, who looked lovely in a leopard-print corset dress

Roberts was clearly excited about the bash, tweeting: 'It's Saturday night and Kimba has a killer party planned.. Who else is letting go tonight?'

Later at the party, she uploaded a photo of herself dancing with the birthday girl, writing: 'I love you Kimberley.'

Also in attendance was TV presenter/actress Denise Van Outen and her husband Lee Mead.

Still in love: The party marked a rare sighting of Roberts' boyfriend Charlie Fennell

Van Outen had clearly enjoyed a rare date night out with her husband, while a friend looked after their one-year-old baby Betsy.

She tweeted: 'Just got home from a fab party to celebrate my friend's 30th birthday. Had a right ol' boogie. Woo hoo!!

Van Outen famously grew close to Walsh when they hiked Mount Kilimanjaro for charity in March 2009.

Other celebrity guests included magican Dynamo, ex-Sugababe Keisha Buchanan and Walsh's Shrek: The Musical co-stars.

Night off: Acting couple Denise Van Outen and Lee Mead left their baby in the care of a babysitter

Buchanan - who duetted with Girls Aloud in 2007 - tweeted: 'I'm at Kimberley Walsh's bday party getting downnnn low low low haha.'

At one point in the evening, the music was turned down as Walsh cut her five-tiered birthday cake, before being presented with a gift by Roberts.

Walsh's big birthday bash comes three days after her bandmate Harding also turned 30.

However, after recently checking out of rehab and breaking up with her fiancé Tom Crane, Harding had a low-key birthday.