Released in 1971, "Who's Next" is the fifth studio album by British rock band The Who. It features some of the band's most well-known songs, including "Baba O'Riley," "Behind Blue Eyes," and "Won't Get Fooled Again." The album is often considered one of the greatest rock albums of all time, with its innovative use of synthesizers, power chords, and layered vocals. It was also a commercial success, reaching the top five on both the UK and US album charts. The themes of the album include disillusionment with politics and authority, as well as personal introspection and relationships.