Mama Cass Elliot was a prominent member of The Mamas & The Papas, an American folk rock vocal group that rose to prominence in the mid-1960s. Known for their rich vocal harmonies, the band's music blended elements of folk, pop, and psychedelic rock, and they were a key part of the counterculture movement. Significant works include hits such as "California Dreamin'" and "Monday, Monday," which have remained enduring classics. Elliot's distinctive contralto vocals added depth to the group's harmonic sound and her charismatic presence contributed significantly to the band's popularity.