With the final just three weeks away, the pressure is on for the remaining acts to pull out all the stops as they perform songs from the movies *jazz hands* Gary Barlow mentors the boys - Craig and Marcus - Kelly Rowland is in charge of the girls - Janet, Misha B and Amelia - and Tulisa Contostavlos is leading Little Mix, the last of the groups. Meanwhile, Kitty's departure last week means Louis Walsh has no acts left in the competition and will be the only impartial judge. Dermot O'Leary presents, and dances a little at the beginning.