Joey Fatone doesn't look like he fully committed to his look, while Ashlee Simpson and Pete Wentz went almost completely back in time.
After hitting up a fancy gala the night before, the stars attended the 136th Kentucky Derby, though I bet if you asked any of them what happened they would probably say "Uh...I wore a big hat." That's okay, the only reason I would have known what happened if I went would be because I bet a bunch of money on which ever horse had the prettiest name.
[CLICK THROUGH FOR TONS OF PHOTOS]
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more