Is Britney really ready for a comeback? Bloody chewed fingers suggest she's still living on her nerves

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.         Read Here