Deep Purple

Deep Purple are an English rock band formed in Hertford in 1968. Along with Led Zeppelin and Black Sabbath, they are considered to be among the pioneers of heavy metal and modern hard rock, although some band members believe that their music cannot be categorised as belonging to any one genre. They were once listed by the Guinness Book of World Records as "the loudest pop group", and have sold over 100 million albums worldwide. Deep Purple were ranked #22 on VH1's Greatest Artists of Hard Rock programme.

Queen

Queen are a British rock band formed in London in 1971, originally consisting of Freddie Mercury (lead vocals, piano), Brian May (guitar, vocals), John Deacon (bass guitar), and Roger Taylor (drums, vocals). Queen's earliest works were heavily influenced by progressive rock; in the mid-1970s, the band ventured into more conventional and radio-friendly works, bringing them greater commercial success. It also became something of a trademark to incorporate more diverse and innovative styles in their music, exploring the likes of vaudeville, gospel music, electronic music and funk.

Led Zeppelin

Led Zeppelin were an English rock band formed in 1968 that consisted of guitarist Jimmy Page, singer Robert Plant, drummer John Bonham, and bassist John Paul Jones. With their heavy, guitar-driven blues-rock sound, Led Zeppelin are regularly cited as one of the progenitors of heavy metaland hard rock, even though the band's individualistic style drew from many sources and transcends any one music genre. Led Zeppelin did not release songs from their albums as singles in the United Kingdom, as they preferred to develop the concept of album-oriented rock.