One-part teenage melodrama, one-part charming naivete, and more than their share of unshakable early pop melodies, the Shangri-Las were one of the greatest and most important girl groups of the '60s. Along with joyous adolescent energy tailored for high school dances, the trio of Mary Weiss and twin sisters Marge and Mary Ann Ganser also conveyed an eerie darkness that offset their more innocent characteristics. Some of their biggest hits (produced by studio mastermind Shadow Morton) were crushing love songs about dead bikers, doomed love affairs, and familial estrangement. Li...