About Gran Turismo
Gran Turismo is a video game with a soundtrack by several artists. See http://musicbrainz.org/release/61050e17-d377-40cc-a91b-7b8c425bf3fe.html for a full list. If this non-artist appears in your charts, do last.fm and yourself a favour. Fix your tags by putting the actual artist name in the artist field. Read more about Gran Turismo on Last.fm.