Find great deals on eBay for gary allan greatest hits. Shop with confidence. 16 rows · Gary Allan's Greatest Hits, released in by MCA Nashville, compiles 15 key songs . Greatest Hits is an album by American country music singer Gary Allan. It was released on March 6, on the MCA Nashville label and has been certified gold by the RIAA. The album includes the greatest hits from his first six studio albums, along with two new songs, "A Feelin' Like Genre: Country.