Emerson, Lake & Palmer, also known as ELP, were an English progressive rock supergroup power trio who sold over forty million albums. The band consisted of Keith Emerson (keyboards), Greg Lake (bass guitar, vocals, guitar) and Carl Palmer (drums, percussion). They were one of the most popular and commercially successful progressive rock bands.
ELP's sound was dominated by the Hammond organ, Moog synthesizer and piano of flamboyant virtuoso Emerson and heavily influenced by classical music as well as jazz and hard and symphonic rock. Lake ensured that each album contained at least one simple, accessible acoustic ballad, many of which received heavy radio airplay. In addition to providing vocals, bass guitar, electric guitar and lyrics, Lake also produced the band's first five albums.