Usually, in
popular music, an album of an artist or group simply consists of a number of songs that the members of the group or the artist have written or have chosen to cover. In a concept album, on the other hand, all songs are considered a single unity, and have purposefully been composed to belong together. The album [Sgt. Pepper's Lonely Hearts Club Band]
? of the
Beatles is frequently considered to have been the first concept album, primarily because the title song, occuring in two versions, wraps around the rest of the album like bookends; however, most of the songs on that album are actually unrelated to one another.
Other famous concept albums include: