After Simon & Garfunkel, one of the most successful duos in pop history, split up in 1970, Art Garfunkel became a solo artist, as well as pursuing an acting career. Garfunkel's pure, high tenor had been one of the most distinctive elements of the duo's music, yet he wasn't responsible for the songwriting -- Simon wrote all of the group's hits. Not surprisingly, Garfunkel relied on other songwriters, from Jimmy Webb and Randy Newman, in addition to rock & roll standards like "I Only Have Eyes for You," throughout his solo career.