Co-founder of popular girl groups the Sugababes and Mutya Keisha Siobhan.
She came to the attention of one-time All Saints manager Ron Tom, the Sugababes' eventual manager; she and her bandmates were nominated for the Best Single Brit Award for Overload, their debut single.
Her first solo album, Revolution in Me, dropped on September 23, 2003, followed by her second, Ghosts, in June 2007.
Her sister, Róisín, was her make-up artist. She and long-term boyfriend Chris McCoy married in January 2013. They had a son named Ford in on August 13, 2017.
Her departure from Sugababes in 2001 was prompted by a falling out with Keisha Buchanan; they later made up and reunited as Mutya Keisha Siobhan.