Perez Hilton celebrated his 34th birthday with a Mad Hatter tea party birthday celebration at Siren Studios in Hollywood, Calif., yesterday. A bunch of celebrities attended and opted to wear fancy headwear to the event.

The famous blogger wore an India-inspired costume complete with a turban and silver slippers.  Kim Kardashian wore a black and white dress with a delicate matching hat.

Ashley Tisdale stayed true to her Disney roots by donning Minnie Mouse ears, a leather jacket, and cut-off shorts.

Former porn star Jenna Jameson wore a top hat, bodysuit and chunky boots.

Check out photos of the partygoers...