Cat Deeley presents a singing competition with a difference.

Five groups compete each week, over three rounds, in front of five judges – using only their voices.

The standard of singing is incredible and it’s a pretty slick production too… fast paced, with nice touches such as a house group and an a cappella performance from a superstar each week, beginning with The Vamps.

After their opening number, the lowest-scored group is eliminated, then the remaining four go through to the iconic artist round, which is David Bowie tonight.

Finally, the last two groups battle it out in the showdown, with one going through to the final.

The prize is the chance to record an album and release a single in time for Christmas.