The X Factor final 2015 LIVE: Louisa Johnson and Reggie N Bollie through to the final, Che Chesterman is eliminated

Leona Lewis and Little Mix are also set to perform.

Does Che Chesterman have what it takes to win The X Factor? - Syco / Thames / Corbis

Tonight we'll be one step closer to the moment of truth. Well, the moment of truth for the 12th time now.

We've come to the first day of the final for series 12 of the show, with three contestants now battling their claws out for the grand prize. Will favourite Louisa Jonson sail through to take the crown? Or will Che Chesterman overcome the fact he's twice been in the bottom two and steal away the glory? Or will we be spending Christmas bouncing to Reggie N Bollie's remixed take on the winner's song, Bob Dylan's "Forever Young"?

Plus, we'll be seeing live performances from Ben Haenow, Leona Lewis, Little Mix, and Fleur East.

• Che Chesterman performs Amy Winehouse's "Valerie", but Simon Cowell labels him the "underdog" of the competition. 
• Reggie N Bollie perform a mash-up of Spice Girls' "Spice Up Your Life" and Outhere Brothers' "Boom Boom Boom"
• Louisa Johnson performs R. Kelly's "I Believe I Can Fly"
• Che Chesterman duets with Rod Stewart. 
• Reggie N Bollie duet with Craig David and Fuse ODG.
• Louisa Johnson duets with Rita Ora.
• Fleur East and Little Mix perform together. 

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