Andy Griggs, newcomer Josh Turner and the band Rushlow have been added to the list of performers at the International Fan Club Organization’s 37th annual concert on June 8 in Nashville. The show at the Ryman Auditorium will serve as a prequel to the CMA Music Festival taking place June 10-13 in downtown Nashville. Other acts performing at the IFCO show include Tracy Byrd, Deborah Allen and Cowboy Crush.