Siobhán Emma Donaghy (born 14 June 1984 in London), is an English singer songwriter. Until September 2001, she was a founding member of English pop group the Sugababes, after which she was replaced by Heidi Range. Since her departure from the Sugababes, Donaghy has released five solo singles and two albums and appeared in hit stage show Rent for its 2007-2008 run where she played Mimi. Donaghy is now planning a more serious route into acting after deciding to put her solo career to rest.