Mandolin virtuoso Bobby Osborne and his Rocky Top X-press headline the August 15th concert. Osborne is twice a member of the International Bluegrass Hall of Fame, inducted in 1994 as a member of the Osborne brothers and again in 2009 with the Lonesome Pine Fiddlers. Osborne and his brother, Sonny, were nominated as the Country Music Association’s Vocal Group of the Year six times and won the award in 1971. Osborne is a member of Nashville’s Grand Old Opry, and his version of “Rocky Top” is the state song of Tennessee.