Justin Bieber Is Simon Cowell's New X Factor Enemy

08/29/2012
. (TMZ) Simon Cowell has a new enemy ... Justin Bieber -- 'cause the pop star has teamed up with rival "X Factor" judge L.A. Reid to become a celebrity mentor on the upcoming season of the show.

TMZ has learned ... Bieber agreed to be one of 4 celebrity mentors assigned to one of the 4 judges ... Simon, L.A., Britney Spears and Demi Lovato.

Bieber agreed to help out L.A.'s squad ... and yesterday, Justin went to a home in the Hollywood Hills to dish out some advice to the contestants.

It's unclear which celebrities have been tapped to help out the other judges -- but good luck doing better than Bieber. more on this story

TMZ submitted this story.
Copyright TMZ - Excerpted here with permission.

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