It isn’t every night that “celebrities” like Ashlee Simpson, Lauren Conrad and the Jonas Brothers descend on Washington, D.C., though many of them match the intellectual level of our chief executive (a frightening but true thought).

Those stars - along with Ben Affleck, Jennifer Garner, Rob Lowe, Marcia Cross and Gossip Girl star Ed Westwick - were guests at the White House Correspondents’ Association dinner on Saturday night in Washington.

President George W. Bush and Late Late Show host Craig Ferguson poked fun at themselves, the celebrities, and all three presidential candidates in front of an audience of the Washington press corps at the annual gala.

“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 Bush, and her May 10 wedding to fiancé Henry Hager - likening her to John McCain.

“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.”

Jenna Bush, for her part, has indicated that she may not support McCain in this November’s election. Henry Hager is a former aide to Karl Rove.

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

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