"As Sly and the Family Stone sang, the '70s really were a family affair. Following the monstrous popularity of The Jackson 5, another musical family climbed to pop stardom: The Osmonds. In the early '70s, the group -- consisting of brothers, from left, Merrill, Wayne, Alan, Jay and Donny, seen here with brother Jimmy, right, and sister Marie, left --  transitioned from their barbershop harmonies and variety shows to teen idol status with songs like ""One Bad Apple."" Eventually, Marie and Jimmy got in on the act, too."
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