In 1977 the Oak Ridge Boys fully switched from gospel to country with the release of their first ABC Records (later absorbed by MCA) album, "Y'all Come Back Saloon". Two songs from that album reached the top five on the country charts, and their next album, "Room Service", in 1978, gave them two more, including their first number-one hit, "I'll Be True to You". "The Oak Ridge Boys Have Arrived" was released in 1979, and "Together" followed in 1980. A compilation album simply titled "Greatest Hits", containing 10 singles from the previous four albums, was released in the fall of 1980. This same year, the Oak Ridge Boys also made a brief cameo appearance on "The Dukes of Hazzard" (season 2, "Granny Annie").