Britney Spears and Demi Lovato Cut LooseGlamour shots! Terrorizing Simon Cowell! The judges share personal pics from backstage at X Factor and more

BIG BANG THEORY

Spears's fellow X Factor judge Demi Lovato showed off her new fringe with a little help from Eminem, rewriting the lyrics to "Without Me" and posting "Guess what's back, back, back, back again..... BANGS are back, back, back tell your friends."



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