Deep Purple are an English rock band formed in Hertfordshire 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 the members of the band have always refused to label themselves as heavy metal. The band has also incorporated pop and progressive rock elements . It was once listed by the Guinness Book of World Records as the world-s loudest band; and it has sold over 100 million albums worldwide. Deep Purple was ranked #22 on VH1-s Greatest Artists of Hard Rock program.The band has gone through many line-up changes and an eight-year hiatus. The 1968-76 line-ups are commonly labelled Mark I; II; III and IV.Their second and most commercially successful line-up featured: Ian Gillan (vocals); Ritchie Blackmore (guitar); Jon Lord (keyboards); Roger Glover (bass guitar) and Ian Paice (drums). "Black Night" is a song by British hard rock band Deep Purple, first released as a single in June 1970 and later included on the 25th Year Anniversary version of their 1970 album, In Rock. The song became a hit following its release, peaking at #2 on UK charts, and to this day.