bieber wonder getty 'X Factor': Justin Bieber and Stevie Wonder to duet [Update][Update: The performance is being taped on Wednesday. However it won’t air until next week during the finale.]

Fans of “The X Factor” are about to get a special pre-Christmas gift on Wednesday’s (Dec. 14) episode. Pop mega-star Justin Bieber and music legend Stevie Wonder are set to take the stage.

Sources close to the production have confirmed that the two are slated to do a duet midway through the semi-final performance. The songs are thought to be “Santa Claus is coming to town” and “The Christmas Song.” It’s also entirely possible that a certain past contestant from “The X Factor” who is infatuated with Bieber might just take the stage.

These are the biggest stars yet to join the show for a musical performance. Previous singers include Lenny Kravitz, Mary J. Blige and Rihanna.

Bieber and Wonder have an interesting history together. Back when Bieber was still 13-year-old and posting videos on YouTube, one of the songs he covered was Wonder’s holiday tune “Someday at Christmas.”

Posted by:David Eckstein