"You're going to get on them right now and begin campaigning," said Dermot O'Leary.
The night started with an outstanding performance by America’s X Factor, Fifth Harmony who sang Boss, before last year’s winner, Sam Bailey, returned to the stage.
The time then came for Dermot to announce who would be making it to the X Factor final.
Fleur East was the first act to have a place in the final before Ben Haenow was sent through to next week’s show.
Andrea Faustini and Lauren Platt prepared to sing in the final sing off of the competition.
Let it Go’s Idina Mensel and Michael Buble then sang their first live performance of Baby It's Cold Outside.
Lauren was first to perform, singing Faith Hill's There You'll Be, before Andrea sang Jessie J's Who You Are. In the end, Cheryl Cole saved her act, Lauren before Louis Walsh, Simon Cowell and Mel B saved Andrea.
Tune in next Saturday to find out who will be crowned the X Factor's 2014 winner.