British rock group the Beatles in costume for 'The Beatles Christmas Show' at the Astoria Cinema, Finsbury Park, London, on New Years Eve, 31st December 1963. From left to right, George Harrison, Paul McCartney and John Lennon, with Ringo Starr at the back. The show continued until 11th January 1964. (Photo by Evening Standard/Hulton Archive/Getty Images)
English Rock group the Rolling Stones perform onstage at an unspecified venue, mid to late 1960s. Pictured are, from left, Keith Richards and Brian Jones (1942 – 1969), both on guitars, and vocalist Mick Jagger. (Photo by Silver Screen Collection/Getty Images)
American musicians Paul Simon (left) and Art Garfunkel of the folk duo Simon & Garfunkel perform together on a television show at BBC Television Centre in London in 1967. (Photo by David Redfern/Redferns)
American psychedelic rock band Beacon Street Union, circa 1966. From left to right, they are guitarist Paul Tartachny, bassist Wayne Ulaky, drummer Richard Weisberg, singer John Lincoln Wright and keyboardist Robert Rhodes. (Photo by Don Paulsen/Michael Ochs Archives/Getty Images)
