Yesterday, the “Queen of Prep” Lilly Pulitzer died at the age of 81 in her home in Palm Beach. For today’s “Look-of-the-Day,” we’re featuring one of her former classmates from the Chapin School in Manhattan – Miss Jacqueline Bouvier Kennedy. We actually had the photo of Jackie saved in our folder of favorite summer looks, but couldn’t find the designer. But then the photo popped up all over the place today, due to Pulitzer’s death. Here, the former First Lady is wearing a yellow and white gingham print shift dress that she wore during a LIFE photo shoot. Kennedy was one of the first celebrities to wear Pulitzer’s shift dresses, which were eventually nicknamed “Lillys.” Perfect look for spring & summer!