One of the most famous outfits Diana ever wore, this sexy off-the-shoulder number by Christina Stambolian was Diana's choice for a party at the Serpentine Gallery in London in 1994. Diana had separated from Prince Charles, and rumour has it on this day she learned he was about to announce his love for Camilla Parker Bowles. Sporting this sexy dress with high heels was Diana's form of fashion revenge. And while the sheer tights and pearl choker would probably be replaced with something a little more modern if it was worn today, this is a style we see on the red carpet and the high street to this day.