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NEW YORK, UNITED STATES - DECEMBER 09: Princess Diana With Her Friend Liz Tilberis Arriving At The Metropolitan Museum Of Art In New York For The Costume Institute Ball In A Dress Designed By Fashion Designer John Galliano (Photo by Tim Graham Photo Library via Getty Images)

NEW YORK, UNITED STATES - DECEMBER 09:  Princess Diana With Her Friend Liz Tilberis Arriving At The Metropolitan Museum Of Art In New York For The Costume Institute Ball In A Dress Designed By Fashion Designer John Galliano  (Photo by Tim Graham Photo Library via Getty Images)