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LONDON, UNITED KINGDOM - MARCH 15: Lady Diana Spencer, later to become Diana, Princess of Wales wears a revealing Emanuel black dress as she attends her first official engagement with Prince Charles at a fundraising concert at the Goldsmiths Hall on March 15, 1982 in London, England. (Photo by Anwar Hussein/Getty Images)

LONDON, UNITED KINGDOM - MARCH 15:  Lady Diana Spencer, later to become Diana, Princess of Wales wears a revealing Emanuel black dress as she attends her first official engagement with Prince Charles at a fundraising concert at the Goldsmiths Hall on March 15, 1982 in London, England. (Photo by Anwar Hussein/Getty Images)