It’s the live final of Pitch Battle, the show that sees choirs of all sizes pitched against each other (a bit like Pitch Perfect). Mel Giedroyc hosts while Gareth Malone, Kelis and guest Deke Sharon serve as judges. The six final choirs will go through a series of head-to-head choral challenges after an epic musical mash-up opens the show. Each group collaborates with a superstar (examples including Will Young, Chaka Khan, Bebe Rexha and Seal, among others) and then they’ll battle against their opponent in a themed riff-off. The judges whittle the finalists down to three, and then two, leaving the viewers to pick the ultimate winner.