Kate "KT" Tunstall (born 23 June 1975) is a Scottish singer and songwriter. She broke into the public eye with a live solo performance of her song "Black Horse and the Cherry Tree" on Later with Jools Holland.

Tunstall received three BRIT award nominations when they were announced on 11 January 2006. Nominations included Best British Live Act, British Breakthrough Act, and British Female Solo Artist. At the ceremony on 15 February 2006, Tunstall performed "Suddenly I See" and won the award for Best British Female Solo Artist, remarking that she wished to share it with fellow nominee Kate Bush.

She received a 2007 Grammy Award nomination for Best Female Pop Vocal Performance for "Black Horse and the Cherry Tree", but the award went to Christina Aguilera's "Ain't No Other Man."