Pink Floyd were an English rock band who earned recognition for their psychedelic music in the late 1960s and, as they evolved in the 1970s, for their progressive rock music. Pink Floyd's work is marked by the use of philosophical lyrics, sonic experimentation, innovative album cover art, and elaborate live shows. One of rock music's most critically acclaimed and commercially successful acts, the group has sold over 200 million albums worldwide, including 74.5 million certified units