Emma Willis hosts the opening Knockout round, as 12 acts perform for a place in the live Semi-Final. Coaches Will.i.am, Sir Tom Jones, Olly Murs and Meghan Trainor all return to their infamous red chairs as the acts they have chosen from the blind auditions and the Battle Rounds fight for their place on their coach's team.

Emma Willis presents highlights from the spinning-chair singing contest, Revisiting the coaches' favourite Blind Auditions and featuring some of the most memorable performances.