>> in the '70s, that distance between the performer on stage and that audience grew. >> if you went to any of the big arena rock shows, it was always about the star up here and the audience down here. and this sort of iconography of the rock star as this huge figure. ♪ crazy crazy on you ♪ ♪ oh ♪ >> it was bound to happen, but it comes as a shock nevertheless. in a poll taken by a leading pop music magazine in england, the beatles came in second. the most popular rock group in england these days is called the led zeppelin. >> in their 20s, they're rich, powerful, temperamental, and pampered. they are the led zep lip, a rock group on tour. in the vernacular of the record biz, where to be merely big is nothing, zeppelin is very big. to get around, zeppelin uses a chartered 707.