Karen Matheson OBE is a Scottish folk singer who frequently sings in Gaelic. She is the lead singer of the group Capercaillie and was a member of Dan Ar Braz's group L'Héritage des Celtes, with whom she often sang lead vocals, either alone or with Elaine Morgan. She and Morgan sang together on the Breton language song "Diwanit Bugale", the French entry in the Eurovision Song Contest 1996. She made a cameo appearance in the 1995 movie Rob Roy singing the song "Ailein duinn".