LOS ANGELES – AUGUST 22: American folk-pop musicians (from left) Art Garfunkel and Paul Simon, of the duo Simon and Garfunkel, sing and play guitar as they perform on the CBS variety program 'The Red Skelton Hour,' USA, August 22, 1966. (Photo by CBS via Getty Images)
American popular music duo Simon and Garfunkel, who are singer (and later actor) Art Garfunkel and guitarist and singer Paul Simon, performs on the CBS variety program 'The Ed Sullivan Show,' New York, May 22, 1966. (Photo by CBS Photo Archive/Getty Images)
Singer/songwriter Paul Simon (right) and singer Art Garfunkel of the folk rock duo Simon & Garfunkel in a Columbia Records publicity still circa 1967 1966 in New York, New York. (Photo by Columbia Records/Michael Ochs Archives/Getty Images)
American popular music duo Simon and Garfunkel, who are singer (and later actor) Art Garfunkel and guitarist and singer Paul Simon, performs on the CBS variety program 'The Ed Sullivan Show,' New York, May 22, 1966. (Photo by CBS Photo Archive/Getty Images)
NEW YORK, NY – MAY 03: Art Garfunkel performs during 'City Winery Presents A Celebration of the Music of Jimmy Webb' at Carnegie Hall on May 3, 2017 in New York City. (Photo by Al Pereira/WireImage)
Paul Simon of American folk rock duo Simon & Garfunkel performs the song 'I Am a Rock' on the set of the Associated Rediffusion Television pop music television show Ready Steady Go! at Wembley Television Studios in London on 8th July 1966. (Photo by Ivan Keeman/Redferns)
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)
