The Who Sell Out is the third studio album by the English rock band the Who. It was released on 15 December 1967 by Track Records in the UK and Decca Records in the US. A concept album, The Who Sell Out is structured as a collection of unrelated songs interspersed with fake commercials and public service announcements, including the second track "Heinz Baked Beans". The album purports to be a broadcast by pirate radio station Radio London. The reference to "selling out" was an intended irony, as the Who had been making real commercials during that period of their career, some of which are included as bonus tracks on the remastered CD.

The Who are an English rock band formed in London in 1964. Their classic lineup (1964–1978) consisted of lead vocalist Roger Daltrey, guitarist Pete Townshend, bassist John Entwistle and drummer Keith Moon. They are considered one of the most influential rock bands of the 20th century. Their contributions to rock music include the development of the Marshall stack, large public address systems, the use of synthesisers, Entwistle's and Moon's influential playing styles, Townshend's feedback and power chord guitar technique, and the development of the rock opera. They are cited as an influence by many hard rock, punk, power pop and mod bands. The Who were inducted into the Rock and Roll Hall of Fame in 1990.