What will the three acts be impressing the judges and studio audience with? Check out the song choices below!
'In The Air Tonight' - Phil Collins
'Valerie' - Mark Ronson Ft. Amy Winehouse
'Fighter' - Christina Aguilera
'I Believe I Can Fly' - R Kelly
Reggie 'N' Bollie
'Spice Up Your Life' / 'Boom Boom Boom' - Spice Girls / Outhere Brothers
'Jump' - Kriss Kross
There will be tons of guest performances over the weekend too in a Best of British theme - mainly involving lots of X Factor alumni! On Saturday, Fleur East will be performing with Little Mix, while last year's winner Ben Haenow will take to the stage with Leona Lewis.
On Sunday, the music extravaganza will continue with performances from Coldplay, One Direction and Adele. Sounds like it's not one to miss!
Also on Sunday, the final two acts will perform their song of the series and the winner's single.
The X Factor Final airs this Saturday and Sunday at 8pm on ITV.
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X Factor's most shocking moments: