Nick Knowles and Myleene Klass present the competition to find the nation's favourite choir.
During the auditions at London's Cadogan Hall, 60 of the best choirs face an expert panel of judges comprising opera superstar Russell Watson; actress, singer and West End star Sharon D Clarke; and choral conductor and director Suzi Digby OBE.
The choirs must perform to impress the judges, but with a limited number of places available in the next round they have to pull out all the stops, showing that they not only have the technical ability but also the passion to bring their songs to life. From 60 choirs, 27 will make it to call back. Out of those, just 15 will take part in the heats.