Lester Louis Adler is an American record and film producer and the co-owner of the Roxy Theatre in West Hollywood, California. Adler has produced and developed a number of high-profile musical artists, including The Grass Roots, Jan & Dean, The Mamas & the Papas, and Carole King. King's album Tapestry, produced by Adler, won the 1972 Grammy Award for Album of the Year and has been called one of the greatest pop albums of all time.

The Mamas & the Papas was a folk-rock vocal-group which recorded and performed from 1965 to 1968. The group was a defining force in the music scene of the counterculture of the 1960s. Formed in New York City, the group consisted of Americans John Phillips, Cass Elliot, and Michelle Phillips, and Canadian Denny Doherty. Their sound was based on vocal harmonies arranged by John Phillips, the songwriter, musician, and leader of the group, who adapted folk to the new beat style of the early 1960s.