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LONDON, UNITED KINGDOM - JULY 14: Princess Diana At A Banquet At Claridges. Wearing The Spencer Diamond Tiara, Queen Mary's Cabochon Cabuchon) Emerald And Diamond Choker Necklace (a Gift From The Monarch) And The Royal Family Orders Presented To Her Also (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - JULY 14:  Princess Diana At A Banquet At Claridges. Wearing The Spencer Diamond Tiara, Queen Mary's Cabochon  Cabuchon) Emerald And Diamond Choker Necklace (a Gift From The Monarch) And The Royal Family Orders Presented To Her Also  (Photo by Tim Graham Photo Library via Getty Images)

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Picture From File:The Princess Of Wales Attends A Gala Dinner At The Tate Gallery On Her 36Th Birthday. . (Photo by Mark Cuthbert/UK Press via Getty Images)

Picture From File:The Princess Of Wales Attends A Gala Dinner At The Tate Gallery On Her 36Th Birthday. . (Photo by Mark Cuthbert/UK Press via Getty Images)

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LONDON, UNITED KINGDOM - NOVEMBER 11: Diana Princess of Wales at an evening function at the Dorchester Hotel indress designed by fashion designer Catherine Walker. (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - NOVEMBER 11:  Diana Princess of Wales at an evening function at the Dorchester Hotel indress designed by fashion designer Catherine Walker.  (Photo by Tim Graham Photo Library via Getty Images)