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LONDON, UNITED KINGDOM - NOVEMBER 20: Diana, Princess Of Wales, Attending A Gala Evening In Aid Of Cancer Research At Bridgewater House In London. The Princess Is Wearing A Dress Designed By Fashion Designer Jacques Azagury (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - NOVEMBER 20:  Diana, Princess Of Wales, Attending A Gala Evening In Aid Of Cancer Research At Bridgewater House In London.  The Princess Is Wearing A Dress Designed By Fashion Designer Jacques Azagury  (Photo by Tim Graham Photo Library via Getty Images)