I think Little Casaroo is one of the more fascinating shops I have found. There is an entire collection of small top hats based off cartoon characters. Who wouldn't love that? In fact, I would love to see these hats from Little Casaroo become a bit of a trend at conventions and costume parties. At $20 a hat, they are priced quite fairly.
I know all of the hats aren't completely covered in pink, but there is the common color in each hat from Art by Audrey. They each look perfect for a pretty princess. My favorite is the first one, which the shop describes as a steampunk mini lolita style. Which do you like best?