In Honor of Princess Diana's Birthday, We're Looking Back at Some of Her Most Memorable Style Moments

Princess Diana redefined the royal dress code. From her high-fashion wardrobe to her willingness to take sartorial risks (shorter hemlines, lower necklines ... the list goes on), she quickly became a style icon. To celebrate the late Princess of Wales's 57th birthday on Sunday, July 1, we're looking back at some of our favorite Princess Di outfits. JGeorges DeKeerle/Getty Catherine Kast, Style Editor: Diana's Philip Somerville topper (worn to a visit to the Gulf States in 1989) is utterly perfec...