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CHICAGO, UNITED STATES - JUNE 05: Princess Of Wales In Chicago, USA, Arriving For Gala Dinner At Field Museum Of Natural History. Diana Is Wearing A Dress Designed By Fashion Designer Versace And Shoes By Jimmy Choo (Photo by Tim Graham Photo Library via Getty Images)

CHICAGO, UNITED STATES - JUNE 05:  Princess Of Wales In Chicago, USA, Arriving For Gala Dinner At Field Museum Of Natural History.  Diana Is Wearing A Dress Designed By Fashion Designer Versace And Shoes By Jimmy Choo  (Photo by Tim Graham Photo Library via Getty Images)