Cat Deeley hosts as 30 groups take to the stage at London's Troxy in the UK's first vocal-only entertainment show. The first five groups step up to impress the Judges.

Cat Deely hosts five more vocal groups go head-to-head in the medley round and give performances inspired by Bruno Mars in the iconic artist round.

This episode has no summary.

This episode has no summary.

This episode has no summary.

This episode has no summary.

This episode has no summary.