Catherine Roseanne Dennis (born 25 March 1969) is a British singer, songwriter, record producer and actress. After a moderately successful international solo career, Dennis later achieved great success as a writer of pop songs, scoring eight UK number ones and winning six Ivor Novello Awards.
In 2004, Dennis was listed 66th in the Q Magazine list of the top 100 most influential people in music and in 2006, she won the UK music industry's Woman of the Year Award.