Mutya Keisha Siobhan were amongst the guests of Channel 4’s Sunday Brunch this morning, joining Team GB Olympic swimmer Keri-Anne Payne, comedian Al Murray, and Queen-legend Roger Taylor in the lineup.

Taking part in various interviews throughout the show (as both a band and also helping out during the show’s ‘challenges’), the original Sugababes joined together again to close the show with an acoustic performance of current single Flatline.

Taken from their forthcoming as-yet-untitled new album, Flatline is the first piece of official new material from the girls since they reunited again back in 2012.

Watch the performance below, and hit the iTunes link to download Flatline now.