Popsugar Fashion Princess Diana Princess Diana's Most Stylish Hats We're Tipping Our Hats to Princess Diana's Timeless Toppers August 31, 2015 by Mandi Villa View On One Page Photo 10 of 44 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 10 High Fashion on the High Seas In April 1987, the princess paired her military jacket with a white sailor hat at the Sovereign's Parade at the Royal Military Academy in Berkshire, England. Previous Next Start Slideshow Princess DianaHats