Louisa Johnson is to sing R. Kelly's 'I Believe I Can Fly' at 'The X Factor' final.

Louisa Johnson

Louisa Johnson

The 17-year-old hopeful will also perform a rendition of Christina Aguilera's 'Fighter' in the first leg of the show's final on Saturday (12.12.15).

Che Chesterman will be singing Phil Collins' 'In The Air Tonight' as well as 'Valerie' by Mark Ronson and the late Amy Winehouse.

Reggie 'N' Bollie meanwhile will be performing a mix of Spice Girls' 'Spice Up Your Life' and Outhere Brothers 'Boom Boom Boom' and 'Jump' by Kris Kross.

However, while their final song choices have now been confirmed, it's yet to be revealed who each of the finalists will be performing their duets with, although Louisa is set to take to the stage with her mentor Rita Ora.

And Rita has admitted she'd love to win as it's her first series on the show, but thinks Louisa has a great career ahead of her no matter what.

She said: "We've found a star anyway. It'd be amazing for her to be the winner, but I don't think this will be the last time you see Louisa Johnson."