''Who's Next'' is the fifth album by the English rock band The Who. It was released on 31 July 1971 by Decca and MCA in the United States and 25 August 1971 in the United Kingdom through Track and Polydor. The album has origins in a rock opera conceived by Pete Townshend called ''Lifehouse''. The ambitious, complex project did not come to fruition at the time and instead, many of the songs written for the project were compiled onto ''Who's Next'' as a collection of unrelated songs. ''Who's Next'' was a critical and commercial success when it was released, and has been certified 3x platinum by the RIAA. - Wikipedia