Serena Fashion Pose

I haven't had too much motivation to draw lately, but yesterday I was thinking about Serena and her globe-trotting journey and decided to revisit her sundress outfit. I lengthened the skirt to her calves and changed the sleeves to have an open cuff. With the purse and hat this makes for a breezy but elegant outfit. My only concern is how I drew the sunhat. It works for now, but at certain points it doesn't look convincing. Does anyone have advice on drawing these hats on fluffy hairstyles like Serena's?