For their first song, the final four will perform tracks from the Motown back catalogue. The second song each act performs will be 'The Song To Get You To The Final'.
Misha Bryan, Amelia Lily, Little Mix and Marcus Collins are the acts vying for a spot at the Wembley Arena grand finale on Saturday, December 10.
Kelly Rowland and Justin Bieber, performing his festive track 'Mistletoe', will be the guests on this weekend's results show.
All four finalists performed two songs at a secret Talk Talk gig in London last night.
The X Factor semi-final airs on Saturday at 8pm on ITV1.
> 'X Factor' final four play Talk Talk London secret gig - In Pictures
> 'X Factor' Final Four: Who should win?