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"). The group's sixth album, "Fancy Free", released early in 1981, contained the Dallas Frazier-penned song "Elvira". This remains the group's most widely known song, and "Fancy Free" is their best-selling album. "Elvira" had been recorded by other artists, including Frazier himself in the late 1960s and The First Edition in 1970, but the Oak Ridge Boys were the first to have a hit with it. Their version of the song was a number-one country hit, and in July 1981 reached No. 5 on the pop charts. The doo-wop-style title track from "Bobbie Sue", their seventh album, was another crossover hit, reaching No. 1 on the country charts and No. 12 on the pop charts. That album also spawned the group's first U.S.-released music video, for the song "So Fine". (A video was made for "Easy", from the "Y'All Come Back Saloon" album, but was never released in the U.S.) The group also recorded "The Oak Ridge Boys Christmas" album in 1982. Their album "American Made", released in January 1983, created controversy when the title track became the source of a TV ad for Miller Beer. The original opening lines say:  Miller's ads used slightly different words:  The Oak Ridge Boys did not want the song used in the ads, but had no part in the decision. The group would not sing it during the commercial's run. The group made three albums over the next three years. The late-1983 album "Deliver" provided two number-one singles, one of which, "I Guess It Never Hurts to Hurt Sometimes", was written by Randy VanWarmer, who had a hit in 1979 with "Just When I Needed You Most". Their next album was "Greatest Hits 2", released in July 1984.