It was confirmed at a press conference on Monday (December 19) that Justin Bieber and former X Factor UK winner Leona Lewis will perform at the final, which takes place over two days this week on Fox.
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Bieber's appearance will be pre-recorded before transmission, as was his recent appearance on The X Factor UK.
He will be joined by former X Factor USA hopeful Drew Ryniewicz - who made the Top 7 - and Stevie Wonder, according to The Hollywood Reporter.
Pitbull and Ne-Yo will also perform during the final, and each of the Top 3 finalists - Melanie Amaro, Josh Krajcik and Chris Rene - will duet with a mystery special guest, as has become tradition on the UK version of the show.
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The running order for the final was also revealed, with Krajcik performing first, Rene second and Amaro third.
The X Factor final airs on Wednesday, December 21 and Thursday, December 22 at 8/7c on Fox in the US.
It will be broadcast on Thursday, December 22 at 8.30pm and Friday, December 23 at 8pm on ITV2 in the UK.
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Watch the X Factor USA's Top 4 group performance from the semi-finals below: