Friday, October 5, 2012 7:24am ET by  
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Justin Bieber confirmed for X Factor USA's Judges' Houses

Justin Bieber is set to appear on the X Factor USA as a mentor.

The singing star will join Nick Jonas, will.i.am and Marc Anthony as guest tutors during the Judges' Houses stage.

It is unclear yet what judge each act is assigned to but fans have already guessed who will be paired with who.

Announcing the news last night (October 4) on Twitter, X Factor USA said:

"Yup! You heard correct! @JustinBieber, @NickJonas, @MarcAnthony, and @IamWill are joining us next week at judges homes! Who's excited?!"

As previously reported, Bieber has blamed a combination of spaghetti and milk for a recent on-stage vomiting incident, which can be seen below.

Watch Justin Bieber throw up below: