By Breaking Celebrity News Staff

Britney Spears walked off the set of The X Factor auditions in Greensboro, North Carolina Monday, Breaking Celebrity News has learned, after the pop superstar was rattled when a man -- dressed in partial drag to resemble her -- took the stage singing her tune, (You Drive Me) Crazy.

"I had to fight real hard to get here," the man said, noting financial difficulties that almost prevented him from trying out for the $5 million prize.

"I don't think she quite understood your tribute," Simon Cowell told the would-be Brit, while judges L.A. Reid and Demi Lovato seemed to get a kick out of it as they chased Britney to get her back on stage.

Britney eventually returned to tell the man, "I really respect the tribute ... it was really nice."

As we previously reported, Britney has walked off the set of her new show for various reasons.

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