Brace yourself for a singing showdown as 30 of the UK's most exciting groups face-off in an a cappella contest based on sheer vocal talent. Cat Deeley hosts. We’re ...

So, she asked the crowd to sing along. "If you know the words, help me out here," she said. From there, she launched into the song a cappella, with those in the crowd slowly joining in.

Brace yourself for a singing showdown as 30 of the UK's most exciting groups face-off in an a cappella contest based on sheer vocal talent. Cat Deeley hosts. We’re ...