American singer best known for her work in the band The Mamas & the Papas as well as her successful solo career.
She was born Ellen Naomi Cohen and started going by "Cass" in high school.
She was posthumously inducted into the Rock and Roll Hall of Fame as a member of The Mamas & the Papas.
Her younger sister Leah is a member of the band Coyote Sisters.
She and Michelle Phillips were both members of The Mamas & The Papas.