It isn’t every night that celebs like Ashlee Simpson, Lauren Conrad, Heidi Montag, Spencer Pratt, Pam Anderson and the Jonas Brothers descend on Washington, D.C.

The stars – along with Ben Affleck, Jennifer Garner, Rob Lowe, Marcia Cross and Gossip Girl star Ed Westwick – were guests of various news organizations for the White House Correspondents’ Association dinner Saturday night.

Simpson’s baby bump was barely visible in her black dress. The 23-year-old attended the event with fiance Pete Wentz.

The celebs were a welcome diversion from the otherwise tepid annual event, in which President Bush and Late Late Show host Craig Ferguson poked fun at themselves and the presidential candidates in front of an audience of the Washington press corps.

“Pamela Anderson and Mitt Romney in the same room?” Bush said. “Isn’t that one of the signs of the apocalypse?”

Bush also joked about his daughter Jenna’s May 10 wedding to fiancé Henry Hager.

“Senator [John] McCain’s not here,” the president told the audience. “He probably wanted to distance himself from me a little bit. You know, he’s not alone. Jenna’s moving out too.”

He added, “[Hillary] Clinton couldn’t get in because of sniper fire and Sen. [Barack] Obama’s at church.”

During Ferguson’s speech, he joked to the president, “By the way, you were fantastic on Deal or No Deal.”

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