Pink Floyd were an English rock band who achieved worldwide success with their progressive and psychedelic rock music. Their work is marked by the use of philosophical lyrics, sonic experimentation, innovative album art, and elaborate live shows. Pink Floyd are one of the most commercially successful and influential rock music groups of all time. They have sold over 200 million albums worldwide, including 74.5 million certified units in the United States. The band was inducted into the Rock and Roll Hall of Fame in 1996.
The band originally consisted of students Roger Waters, Nick Mason, Richard Wright, and Syd Barrett. Founded in 1965, they first became popular playing in London's underground music scene in the late 1960s. Under Barrett's leadership they released two charting singles, "Arnold Layne" and "See Emily Play", and a successful début album, The Piper at the Gates of Dawn (1967). Guitarist and vocalist David Gilmour joined Pink Floyd in 1968, several months prior to Barrett's departure from the group due to the latter's deteriorating mental health. Following the loss of their principal songwriter, Pink Floyd bassist and vocalist Roger Waters became the band's lyricist and