Denny Doherty's career as a pop star didn't last especially long -- he first hit the charts in early 1966 and his star was fading fast by mid-1969 -- but as a member of the Mamas & the Papas, he helped make some of the finest pop singles of the '60s and presented a cheerful, accessible version of hippie culture to America at a time when the world was still struggling to make sense of the growing counterculture. Doherty was a gifted vocalist who launched a solo career after his tenure in the Mamas & the Papas, and also enjoyed a successful career as an actor. Dennis Gerrard Ste...