Britney Spears starts 'X Factor' by walking off the set

Britney Spears' camp is on high damage control duty after the pop star walked off the set of "The X Factor" today -- the very first day of filming. Spears was reportedly upset after a contestant botched a cover version of her 2011 single, "Hold It Against Me." However, the singer was quick to deny that the exit came out of anger and she later tweeted, "LOL was just taking a little break people. I am having the BEST time!!!" The incident comes after pre-filming speculation that the 30-year-old pop star wouldn't be able to deal with the pressure of judging alongside stars like Simon Cowell and Demi Lovato, but hey, it's just day one.