Hollywood celebs celebrate Perez Hilton’s 31st birthday

Any question that Perez Hilton is the most influential blogger on the planet was put to rest on the weekend at his 31st birthday party.

The party, held at the famous Hollywood nightspot The Viper Room, had a guest list that looked like the posts on Hilton’s blog. Entertainment was provided by Christina Aguilera who performed Lady Marmalade, and the rendition of Happy Birthday was led by none other than the Jonas Brothers.

Also in attendance were Amanda Bynes, Steve O., Heidi Montag, Spencer Pratt, Paris Hilton, Doug Reinhardt, Tara Reid, Robin Antin, Lacey Schwimmer, Emmy Rossum, Aubrey O’Day, Meghan McCain (WTF??), Kim Kardashian and Ashley Tisdale.

One thing we’ll say for Perez: girlfriends lost some serious weight, although his sense of fashion is another matter. Here’s Christina Aguilera performing at the party: