Episode 6

It is the live final of Pitch Battle. Host Mel Giedroyc is joined by a trio of musical judges - Gareth Malone, Kelis and guest judge Deke Sharon. Between them they will whittle the six final choirs down to the top two through a series of head-to-head, sing-or-be-sung-off choral challenges, leaving the viewers to pick the ultimate winner.

The final opens with an epic musical mash-up, then each group collaborates with a superstar, including Will Young, Chaka Khan, Bebe Rexha and Seal, amongst others. The groups then battle it out against their opponent in a themed riff-off.

The judges decide three winners to send through to the a cappella round, and after that, which two are the best. It is then down the public to vote for the winner of the £50,000 prize and the title of Pitch Battle Champions.