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Cat Deeley hosts the UK's first vocals-only TV singing contest. 30 a cappella groups from across the country do battle.
Seasons
Episode 1Latest episode
First Five Groups
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.
