The folk quartet The Mamas & the Papas became hugely famous for their sweet vocal harmonies. Unfortunately, things behind the scenes were as unharmonious as you could get. Somehow, the California dreamers and their dysfunctional ways pulled Denny Doherty, a nice guy from eastern Canada, into their chaos. The Mamas & the Papas only spent a couple of years in the limelight, but it would take Doherty the rest of his life to recover from the trauma.