Kelis, Gareth Malone, Seal, Joe Jonas plus more line up to judge BBC One’s brand new Saturday night entertainment music show Pitch Battle Superstar singer Kelis and the nation’s favourite choir master Gareth Malone will be the judges getting their groove on as Saturday night’s sassiest singing show brings summer fun to BBC One. Hosted by Mel Giedroyc, Gareth and Kelis will be joined by a different third judge each week. These are: multi-award winning singer songwriter Seal, DNCE lead vocalist and performer Joe Jonas, Queen of Funk Chaka Khan, American singer/songwriter Bebe Rexha and Brit Award-winning singer Will Young will all be joining Gareth and Kelis as they decide which groups progress to the next stage of the competition.