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LONDON, UNITED KINGDOM - MARCH 26: Princess Diana Talking With Sarah Duchess Of York At A Banquet At Claridges Hotel In London. The Pearl And Diamond Tiara Worn By Princess Diana Was A Wedding Gift From The Queen. (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - MARCH 26:  Princess Diana Talking With Sarah Duchess Of York At A Banquet At Claridges Hotel In London.  The Pearl And Diamond Tiara Worn By Princess Diana Was A Wedding Gift From The Queen.  (Photo by Tim Graham Photo Library via Getty Images)