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LONDON - JULY 30: Princess Diana, Princess of Wales and opera singer Luciano Pavarotti at Hyde Park concert July 30, 1991 in London. (Photo by Anwar Hussein/WireImage)

LONDON - JULY 30:  Princess Diana, Princess of Wales and opera singer Luciano Pavarotti at Hyde Park concert July 30, 1991 in London.  (Photo by Anwar Hussein/WireImage)