Pink Floyd were an English rock band that became famous in the 1960s and 1970s. They performed for more than 30 years, and have sold more than 200 million (200,000,000) albums. They are famous for their live shows and deep music. Most of their albums are concept albums, which means every song is linked through a theme. Their first album was "The Piper at the Gates of Dawn", which was released in 1967. Their latest album is "The Endless River", which was released in November 2014. The band were named after the blues artists "Pink Anderson" and "Floyd Council" by Syd Barrett, one of the band's founder members. In 2005, they played at a concert called Live Aid after 24 years of not playing together. The line up was David Gilmour, Roger Waters, Nick Mason and Richard Wright. They have made some very popular albums including "The Dark Side of the Moon," which was released in 1973 and "The Wall," which was released in 1979. After Richard Wright died in 2008, David Gilmour has said that he does not want to reunite, despite Roger saying he might want to. It is now believed that David Gilmour and Roger Waters are friends after becoming enemies for a long time.