


Although we've had our, ahem, intellectual differences with Perez Hilton in the past, we'll give him the credit of acknowledging that any blogger who can turn themselves into a celebrity in their own right is clearly running an effective business. Writer, producer, publisher, self-promoter: it's a lot of hats to wear, and it should therefore come as no surprise that when Perez hit the big 3-4, he chose to celebrate with a wacky hat party. Let's see which celebrity guests didn't read the invites!

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