"Before she was the legendary Mama Cass of the folk group The Mamas and the Papas, Ellen Cohen was a teen girl from Baltimore with an incredible voice, incredible confidence, and incredible dreams. She dreamed of being not just a singer but a star. Not just a star--a superstar. So, at the age of nineteen, at the dawn of the sixties, Ellen left her hometown and became Cass Elliot. At her size, Cass was never going to be the kind of girl that record...