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BRASILIA, BRAZIL - APRIL 23: Diana, Princess Of Wales, Attending A Banquet At The Itamarati Palace, The President Of Brazil's Official Residence. The Princess Is Wearing An Ivory And Pink Silk Crepe One-sleeved Evening Dress Designed By Catherine Walker. (Photo by Tim Graham Photo Library via Getty Images)

BRASILIA, BRAZIL - APRIL 23:  Diana, Princess Of Wales, Attending A Banquet At The Itamarati Palace, The President Of Brazil's Official Residence.  The Princess Is Wearing An Ivory And Pink Silk Crepe One-sleeved Evening Dress Designed By Catherine Walker.  (Photo by Tim Graham Photo Library via Getty Images)