X Factor judge Kelly Rowland will take to the stage this Sunday to perform a medley of tracks, it has been revealed. The US star will be followed by Justin Beiber on stage, who will be performing his new track Mistletoe.
The teenager has already recorded his performance, to be broadcast this Sunday evening.
Kelly Rowland meanwhile will be singing a number of tracks from her latest studio album, Here I Am, which is out this week.
This Saturday's show will see the final four - Amelia Lily, Little Mix, Marcus Collins and Misha B - battling for a place in next month's Wembley final.