Britney Spears walked off the set of ``X Factor'' moments ago ... and according to several people in the audience, she was upset after a contestant butchered her song, ``Hold It Against Me.''
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Britney Spears walks off 'X Factor'
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Justin Timberlake defends ex Britney Spears
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Britney Spears continues her comeback
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Jamie Lynn Spears not taking care of herself, stressed over
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``Britney Spears and Demi Lovato can't sing''
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Britney Spears wants to 'connect with y'all'
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Britney Spears: 'I could quit music'
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Britney Spears threatened to commit suicide
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Britney to be released tonight?
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Britney Spears suffering from psoriasis?
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Simon Cowell 'feels betrayed by Sharon Osbourne'
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Chris Martin hates people who complain about fame
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Katy Perry - Katy Perry pulls out of People's Choice Awards
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Sharon Osbourne quits ``the X Factor''
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Britney Spears returns to court
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Singer Leona Lewis punched by a fan
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Should Kelly Rowland leave the X Factor?