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Three members of the singing group the Shangri-Las (previously the Bon Bons) on a visit to London. Extreme left and right sisters Margie and Mary Anne Ganser (1947 - 1971) and in the centre Mary Weiss whose sister Betty the fourth member of the group stayed at home in the USA because of illness. (Photo by Ron Case/Getty Images)

Three members of the singing group the Shangri-Las (previously the Bon Bons) on a visit to London. Extreme left and right sisters  Margie and Mary Anne Ganser (1947 - 1971) and in the centre Mary Weiss whose sister Betty  the fourth member of the group stayed at home in the USA because of illness.   (Photo by Ron Case/Getty Images)