Princess Diana's Guide To New York

Or, more specifically, the Met Gala! In 1996, Diana made her first and only appearance at the museum's fabled fashion soiree alongside her friend Liz Tilberis, who was then the editor-in-chief of Harper's Bazaar. She turned heads in a very '90s navy slip dress by John Galliano for Dior, paired with a seven-strand pearl necklace with sapphires and diamonds. 'Twas a look that would go down in history.