Creedence Clearwater Revival (often abbreviated CCR) was an American rock band that gained popularity in the late 1960s and early 1970s with a number of successful singles drawn from seven albums which they released within 5 years: Creedence Clearwater Revival (1968), Bayou Country (1969), Green River (1969), Willy and the Poor Boys (1969), Cosmo's Factory (1970), Pendulum (1970) and Mardi Gras (1972). The group consisted of lead vocalist, lead guitarist, and primary songwriter John Fogerty, his brother and rhythm guitarist Tom Fogerty, bassist Stu Cook, and drummer Doug Clifford. Their musical style encompassed rock and swamp rock genres. Despite their San Francisco Bay Area origins, they positioned themselves as Southern rock stylists, singing often about bayous, the Mississippi River, catfish, and other popular elements of Southern iconography. CCR's music is still a staple of American and worldwide radio airplay and often figures in various media. The band has sold 26 million albums in the United States alone. CCR was inducted into the Rock and Roll Hall of Fame in 1993. "Creedence Clearwater Revival, which disbanded in 1972, were progressive and anachronistic at the same time. An unapologetic throwback to the golden era of rock and roll, they broke ranks with their peers on the progressive, psychedelic San Francisco scene. Their approach was basic and uncompromising, holding true to the band members' working-class origins. The term 'roots rock' had not yet been invented when Creedence came along, but in a real way they defined it, drawing inspiration from the likes of Little Richard, Hank Williams, Elvis Presley, Chuck Berry and the artisans of soul at Motown and Stax. In so doing, Creedence Clearwater Revival became the standard bearers and foremost celebrants of homegrown American music."