Emma Willis hosts the third and final round of this year's battles stage, and at the end of tonight's show, the performers going through to the Knockouts will be decided. Judges Will.i.am, Jennifer Hudson, Tom Jones and Olly Murs take up their places in the famous red chairs as each performer tries to impress them enough to avoid the cut. However, even if the judge who selected an act decides to let them go, they still have a chance to stay in the game if they can convince one of the others to take them on.