"Mama" Cass Elliott had one of the most powerful voices in '60s music. But sadly, her career was cut short in 1974 when she died at age 32. Born Ellen Naomi Cohen, Elliott first worked with Denny Doherty in a band called The Mugwumps. The two of them would gradually join forces with John and Michelle Phillips to create The Mamas and the Papas. Elliott was extremely talented, but she also faced many negative comments about her weight, including from her bandmates. It was ultimately her constant attempts at crash dieting that killed her. Here are the details of the tragic death of The Mamas and the Papas' Cass Elliott.