school achieved cross-over success through jazz-rock fusion with bands like Weather Report, Return to Forever, The Headhunters and The Mahavishnu Orchestra who also influenced this genre and many others. In Germany, Manfred Eicher started the ECM label, which quickly made a name for "chamber jazz". Towards the end of the decade, Jamaican reggae music, already popular in the Caribbean and Africa since the early 1970s, became very popular in the U.S. and in Europe, mostly because of reggae superstar and legend Bob Marley. The mid-1970s saw the reemergence of acoustic jazz with the return of artists like Dexter Gordon to the US music scene, who, along with a number of other artists, such as trumpet innovators like Don Ellis and Woody Shaw, who were among the last of the decade's traditionally-oriented acoustic jazz musicians to be signed to major record labels, to receive critical and widespread commercial recognition and multiple Grammy nominations. The late 1970s also saw the beginning of hip hop music with disc jockeys like DJ Kool Herc and Afrika Bambaataa taking loops from funk and soul records and play them repeatedly at block parties and dance clubs. At the end of the 1970s, popular songs like "Rapper's Delight" by Sugarhill Gang gave hip hop a wider audience. Hip hop was also influenced by the song "The Revolution Will Not Be Televised" by Gil Scott-Heron. Country music also continued to increase in popularity in the 1970s. Between 1977 and 1979, it became more mainstream, particularly with the outlaw movement, led by Waylon Jennings and Willie Nelson. The 70s also saw the rise of a country music subgenre, southern rock, led by the Allman Brothers Band. Other artists; such as Conway Twitty, Loretta Lynn, Don Williams, Kenny Rogers, Dolly Parton, Ronnie Milsap, Crystal Gayle, and Barbara Mandrell; all scored hits throughout the 70s which reached both country and pop charts. The genre also saw its golden age of vocal duos and groups in this decade; with Conway Twitty and Loretta Lynn, George Jones and Tammy Wynette, Jim Ed Brown and Helen Cornelius, the Bellamy Brothers, the Oak Ridge Boys, the Statler Brothers, Dave & Sugar, and The Kendalls. The genre also became more involved in Hollywood toward the end of the decade, with country-themed action films such as Smokey and the Bandit and Every Which Way But Loose, a trend that continued into the early 80s with Urban Cowboy