Led by Gavin Tabone, the Barton Hills Choir has performed on some of the biggest stages in the world with some of the biggest rock stars in the world. Extended: The Barton Hills Choir isn't your average school choir. Led by Gavin Tabone, the Barton Hills Choir - comprised of 3rd, 4th, 5th, and 6th grade students - has performed on the biggest stages in the world with some of the biggest rock stars in the world. From SXSW to the ACL Music Festival, from Stuart Murdoch of Belle and Sebastian to Roger Waters of Pink Floyd, Tabone has given these kids collaborative experiences they'll never forget.