In the world of girl groups or boy bands, the introduction of a new member usually spells commercial suicide. Bananarama continued for a while without Siobhan Fahey but it was never quite the same.

Sugababes are set to perform and be honoured with the MOBO Impact Award at the upcoming ceremony. The seminal R'n'B pop group - comprising Mutya Buena, Keisha Buchanan and Siobhan Donaghy - will be ...