The trademark harmonies and renowned musicianship that won Diamond Rio ACM Top Vocal Group for 2 consecutive years and CMA Vocal Group of the Year for 3 consecutive years still sound like nothing else in country music today. IV marks a bold new step for the band; for the first time, the 6 members of the group have co-produced their album. The collection's 11 tracks were written by some of country's top writers and represents an unprecedented creative collaboration. First single/video: "Walkin' Away."