Capercaillie is a Scottish folk band, founded in 1984 by Donald Shaw and led by Karen Matheson, and which performs traditional Gaelic and contemporary songs in English. The group adapts traditional Gaelic music and traditional lyrics with modern production techniques and instruments such as electric guitar and bass guitar, though rarely synthesizers or drum machines. Capercaillie demonstrate "astonishing musical dexterity" and feature "the peerless voice of co-founder Karen Matheson. Universally recognised as one of the finest Gaelic singers alive today".They have sold over a million albums world-wide, including "three silver and one gold album in the UK". The BBC notes that the band has "achieved enormous global success both as a group and as individual musicians."

Source: Wikipedia (https://en.wikipedia.org/wiki/Capercaillie_(band))