Pop group The Beatles from left to right, Paul McCartney, John Lennon, Ringo Starr and George Harrison, circa 1964. (Photo by Archive Photos/Getty Images)
John Lennon – THE DICK CAVETT SHOW – Behind-the-Scenes Coverage – Airdate: September 12, 1971. (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)
Former member of The Beatles pop group John Lennon with his wife Yoko Ono at Heathrow Airport, London as they pass through from Trinidad on their way to Palma, Majorca to see Justices about the custody of Yoko's seven year old daughter Kyoko. May 1971. (Photo by Dennis Stone/Mirrorpix/Getty Images)
John Lennon performs at Live In New York City Benefit Concert on August 30, 1972 at Madison Square Garden in New York City. (Photo by Ron Galella, Ltd./Ron Galella Collection via Getty Images)
Paul McCartney (left) and John Lennon (1940 � 1980) performing with The Beatles during their American tour, August 1965. (Photo by Mark and Colleen Hayward/Getty Images)
