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Judges Britney Spears, left, and Demi Lovato sign their names during a handprint ceremony at "The X Factor" season two premiere at Grauman's Chinese Theatre on Tuesday, Sept. 11, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Judges Britney Spears, left, and Demi Lovato sign their names during a handprint ceremony at "The X Factor" season two premiere at Grauman's Chinese Theatre on Tuesday, Sept. 11, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)