The Mamas and the Papas was an American 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. The group was composed of John Phillips, Denny Doherty, Cass Elliot, and Michelle Phillips (born Holly Gilliam). 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.