By Sarah Fitzmaurice
Cleavage has had its day - when it comes to oozing sex appeal it is all about showcasing a curvy derriere.
Tulisa Contostavlos and Nicole Scherzinger showed off their impressive and pert behinds stepping out in figure-caressing dresses at the launch of the new series of the X Factor in London today.
Last year's winning judge Tulisa dressed in a skin-tight bodycon dress in citrus hues by Celeb Boutique for the occasion, and the frock certainly complimented her curves.
Scroll down to hear from the judges
Tight and bright: Both Tulisa Contostavlos and Nicole Scherzinger opted for figure-hugging dresses for the launch of this year's X Factor today
New recruit for the UK show and Former Pussycat Doll Nicole took note of the sunny weather and donned a bright white shift dress to attend the press day at the Corinthia Hotel.
The demure outfit had capped sleeves, rouched detail under the plunging neckline and an exposed zip trailing up the back.
Space age style: Tulisa teamed her figure-hugging dress with a pair of high silver shoes
She's a bit of an all-white: Nicole Scherzinger donned a bright white shift dress enhanced her figure and her derriere
Here come the girls: Tulisa and Nicole shone as they posed up to Louis Walsh and Dermot O'Leary
The girls were joined by veteran judge Louis Walsh, host Demot O'Leary and Xtra Factor presenter Caroline Flack.
Nicole, who was axed from the US show after just one season, replaces Kelly Rowland as the fourth X Factor judge and Louis wasted no time in telling Lewis Hamilton's girlfriend she would love the UK version of the show.
The Irish Entertainment manager noted: 'You're going to have more fun on this show. You are. Simon's in America.'
Louis recently branded Tulisa as a 'chav in a tracksuit' but the former N-Dubz singer didn't appear to hold a grudge and was seen posing up next to him.
Tulisa said there were some hot young male acts to look out for on the show.
Gary Barlow, who recently suffered a personal tragedy - daughter Poppy was stillborn - did not attend the event and is with his family in mourning.
Signature style: Caroline Flack bucked the summer trends in a black playsuit with a lace embellished collar and towering velvet heels
And Caroline's sidekick Olly Murs was also absent today because he is currently touring, but she could have done with his support today.
The newly-blonde TV host spoke out about a One Direction fan magazine that dedicated a whole page to abusing her.
Last night she tweeted: 'Im very aware about the voodoo doll article in a certain magazine and have been for some time. It was one of the most hurtful things ive ever read. But thankyou for all the nice supportive messages! I dont take notice of nasty things written to encourage bullying x.' (sic)
She added: 'Ive never had so many nice messages in one afternoon!!! Me and my crows feet are thankful. X Oh and my neice Willow could write a more intelligent article..and shes seven...rant over... I got some serious blonde hair to sort out..eek.' (sic)
The boys are back: Veteran judge Louis Walsh and Dermot O'Leary were all smiles as they arrived at the event
VIDEO: Hear from the X Factor judges for yourself!...