Is Britney really ready for a comeback Bloody chewed fingers suggest she's still living on her nervesDemi Lovato said to have signed a deal for just over $1m, significantly less than Britney's $15m contract
18:10 GMT, 15 May 2012
It seems nerves got the better of Britney Spears ahead of the X Factor launch in New York yesterday.
The star, 30, pulled out all the stops for the Fox's Upfront Presentation at the Beacon Theatre in New York yesterday with two thigh skimming mini-dresses.
But she was clearly feeling a little jittery before meeting the press, biting her nails down until they bleed.
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Jitters: Britney Spears revealed her bitten nails at the FOX Network UpFront 2012 Presentation in New York yesterday
Ouch: The star's huge engagement ring was not enough to distract from her painful looking fingers
The Toxic singer has long chewed on her nails when feeling anxious and four years ago she even vowed to quit the habit.
She said at the time: 'I have to learn to stop biting my nails! I would like to stop worrying so much, because I worry all the time.'
While the mother-of-two has a troubled history, including a high-profile mental breakdown in 2008, her new boss Simon Cowell isn't concerned.
When asked by TMZ if he was worried about her appearing on live television, he said: 'Not at all.'
New line-up: Britney joins L.A. Reid, Demi Lovato and Simon Cowell on the panel
Quick change: The singer wore two different thigh-skimming outfits at the event
Britney was joined at the event by her fiance and former manager Jason Trawick, who was recently approved as her conservator alongside her father.
Conservators have legal authority over a person's general well-being, which includes decisions about food, clothing and medical care.
He will reportedly accompany Britney on set each day.
Britney is thought to have negotiated a $15 million pay packet to be a panellist on the show, but fellow new recruit Demi Lovato is rumoured to be earning just $1 million.
Britney and Demi will replace Paula Abdul and Nicole Scherzinger – who were axed after poor ratings on last year's debut series – sitting alongside show boss Simon and music executive L.A. Reid.
He's got her covered: Britney's fiance and co-conservator joined her at the event
VIDEO: COURTESY FOX BROADCASTING COMPANY