Cat Deeley hosts the UK's first vocals-only TV singing contest. 30 a cappella groups from across the country do battle.
Episode 1
Academy, Ardú, Elle and the Pocket Belles, Semi-Toned and Tube Army are the first acts to take to the stage at London's Troxy to fight it out for a place in the final. Plus a performance from The Vamps.
Cat Deeley
Hostess
No media available
