CELEBS OUT AT THE WHITE HOUSE 100TH CORRESPONDENT DINNER..WHO ..WORE WHAT & WHY?

First Lady Michelle Obama was ravishing in Marchesa at the annual White House Correspondent's Association Gala at the Washington Hilton hotel in Washington, D.C. President Obama during his prepared roast Saturday to the White House Correspondents' Association dinner instead opted to go after some members of the Washington, D.C., cast who've complicated his five-and-a-half-year tenure in the Oval Office.

"These days, House Republicans are giving [Speaker John Boehner] a harder time than they give me - which means orange really is the new black," the president told the crowd, poking fun at the Ohio Republican's famously tanned skin.

The gathering's namesake White House Correspondents' Association celebrates its 100th anniversary this year, and its annual to-do awash with the incongruous blend of political elite and Hollywood celebrities is often dubbed by those within the Washington beltway, "nerd prom."

 Peep some of our favorite photos from the shindig below:

Spot on! Lupita Nyong'o looked incredible in a dazzling black and white peplum style Oscar De La Renta dress.

Jessica Simpson and fiancee

Kevin Hart and girlfriend Eniko Parrish attend the 100th Annual White House Correspondents' Association Dinner at the Washington Hilton in Washington, DC.

Golden girl: Starring in films including Escape From Planet Earth, Sofia Vergara is U.S. TV's top earning actress.

Red is for ravishing: Bellamy Young was elegant and beautiful in a red strapless gown that featured overlapping layers of silky material.

Shining bright: Darby Stanchfield, the star of ABC's Scandal.