Justin Bieber to Perform on 'X Factor' Finale

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Teen pop idol Justin Bieber has confirmed that he'll appear on the season finale of the FOX singing competition The X Factor.

Bieber tweeted Thursday about his excitement about appearing on the Christmas in Washington TV special with the Obama family -- to air Friday at 8 p.m. on TNT -- and also revealed: "And then next week we got the FINALE of X FACTOR in the US and I'm going HARD!"

The finale of Simon Cowell's The X Factor airs next Thursday, December 22 on FOX.

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