The Mamas and the Papas were an American folk rock group formed in 1965, known for their harmonious vocals and distinctive sound. The group consisted of John Phillips, Michelle Phillips, Denny Doherty, and Cass Elliot. They gained popularity during the 1960s with hits like "California Dreamin'" and "Monday, Monday," which showcased their blend of folk, rock, and pop influences. Their music often reflected the counterculture movement of the time, addressing themes of love, longing, and social change. The Mamas and the Papas disbanded in 1968 but left a lasting impact on the music scene, influencing many artists in subsequent decades.