Britney Spears Spellbound on 'X Factor'

The X Factor goes live for the very first time this season tonight on Halloween. Britney Spears got in the holiday spirit, dressed as a witch.

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"You're casting a spell on my contestants," accused fellow judge Simon Cowell. "That's cheating."

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To see if Britney brews trouble on the panel, watch The X Factor tonight on FOX.