Britney Spears 'X Factor': Singer Shows Major Leg, Cleavage, Joins Judges Panel

Britney Spears may have been rocking an incredibly short dress to officially confirm that she's joining 'The X-Factor", but the move certainly added some length to her career.

Spears will join fellow newcomer Demi Lovato and veteran players, Simon Cowell and L.A. Reid, at the judges table. Pop's first princess announced that she was joining the show at Monday's Fox upfronts.

"I'm so excited about this whole experience," Spears said at the presentation.

Although news of Spears' involvement in the mega-talent show has made major headlines, the "Oops!... I Did It Again" singer's incredibly fit frame deserves a few headlines of its own. Spears showed off her decollete and toned legs in a figure-hugging white dress.