Karen Matheson OBE (born 11 February 1963) is a Scottish folk singer, who frequently sings in Scottish Gaelic. She is lead singer of the group Capercaillie and was a member of Dan Ar Braz's group L'Heritage des Celtes, with whom she often sang lead vocals, either alone or jointly with Elaine Morgan. She and Morgan received much acclaim for their joint lead vocal on the Breton language song "Diwanit Bugale", the French entry to the Eurovision Song Contest 1996. She made a cameo appearance in the 1995 movie Rob Roy singing the song "Ailein duinn".