Celebrities attend White House Correspondents' Association Dinner

(From L to R) Writer Sally Quinn, her husband, former Executive Editor of the Washington Post Ben Bradlee, former editor of the Sunday Times Harold Evans and his wife, Daily Beast and Newsweek Editor-in-Chief Tina Brown, attend the annual White House Correspondents' Association Dinner at the Washington Hilton in Washington, April 28, 2012. [Photo/Agencies]

Uggie the dog, from the movie "The Artist," arrives with trainer Omar Von Muller (2nd R) on the red carpet for the annual White House Correspondents' Association Dinner at the Washington Hilton in Washington April 28, 2012. [Photo/Agencies]

Uggie the dog, from the movie "The Artist," performs on the red carpet for the annual White House Correspondents' Association Dinner at the Washington Hilton in Washington April 28, 2012. [Photo/Agencies]