Pink Floyd were an English rock band formed in London in 1965. Gaining a following as a psychedelic pop group, they were distinguished for their extended compositions, sonic experimentation, philosophical lyrics and elaborate live shows, and became a leading band of the progressive rock genre. They are one of the most commercially successful and influential bands in popular music history. The band were inducted into the US Rock and Roll Hall of Fame in 1996 and the UK Music Hall of Fame in 2005. By 2013, they had sold more than 250 million records worldwide, with The Dark Side of the Moon and The Wall two of the best-selling albums of all time.