The search for the nation's next singing superstar goes on as 12 of the remaining acts sing for a place in the semi-finals as the contest reaches the first knockout show. Coaches will.i.am, Jennifer Hudson, Olly Murs and Sir Tom Jones can only pick one act from their teams to go through, so helping them make those decisions are special guests Kylie Minogue, Craig David, Leona Lewis, members of the Black Eyed Peas and the Voice UK's reigning champion Mo Jamil. Who will go on to the next stage of the contest - and one step closer to that record deal - and who will be heading home? Emma Willis presents.