What band’s most commercially successful line-up, in 1969-73, featured Ian Gillan, Ritchie Blackmore, Jon Lord, Roger Glover and Ian Paice?
Who, called the "King of Jazz", was the leader of the most popular dance bands in the United States during the 1920s, commissioned and debuted George Gershwin's jazz-influenced "Rhapsody In Blue" in 1924?
