KT Tunstall was relatively unknown for the first 15 years of her career, but was catapulted to success in 2004 when she performed on the show Later... with Jools Holland. She uses a loop pedal, which makes her live performances unique. All her songs resonate with her experiences, making the lyrics meaningful. She is also one of the best acoustic guitar players I’ve ever come across. The track Black Horse and the Cherry Tree is my favourite.