'These babies are all mine!': Buxom Miley Cyrus denies boob job rumours

By Daily Mail Reporters

Last updated at 5:22 PM on 14th December 2011

Miley Cyrus has denied speculation she went under the knife for a breast enlargement.

The former Disney star, 19, sparked rumours after arriving at the CNN Heroes tribute event in Los Angeles on Sunday in a low-cut Roberto Cavalli gown.

'All mine!': Miley Cyrus, pictured here at the CNN Heroes tribute in Los Angeles on Sunday night, has denied having a breast enlargement

Her buxom appearance raised a few eyebrows, with several medical experts telling Radar Online that it was likely the Hannah Montana star had surgery achieve the voluptuous new look.

'Her breasts are very nice and round and it looks like she has had them done,' cosmetic physician Dr. Tahl Humes of Vitahl Medical Aesthetics in Colorado told the website.

'If you look at the volume, it appears she has had a breast augmentation.'

Rumour patrol: The star took to her Twitter page to shoot down surgery speculation

However, the Hannah Montana actress, who was accompanied at the event by her Australian boyfriend Liam Hemsworth, took to Twitter to deny the reports.

'Thank you for the compliment but these babies are all mine,' she tweeted.

'I wish they'd realize you don't have to be fake to be beautiful!'