Sugababes Keisha Buchanan, Mutya Buena and Siobhán Donaghy perform live with the BBC Concert Orchestra at Maida Vale. One of the most successful girl groups of the 21st century, Sugababes enjoyed a '00s run of six number one singles and two chart-topping albums. After a number of line-up changes the original members were reunited in 2012, but it has only been over the past year that their comeback could finally gather pace after a number of long-standing legal issues were resolved.