What goes around comes around, and Diana's pretty bell-sleeved blouse, worn on the Royal Yacht Britannia for the start of her honeymoon in 1981, looks like something you might find in your local branch of Urban Outfitters or Forever 21 this Summer. Diana was only 20 years old when this photo was taken, so it makes sense that she was wearing a look that girls of a similar age are sporting again now. Even royals love a trend occasionally!