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'Nerd Prom' Kicks Off in Washington

D.C.'s nerds rub elbows with some celebrities -- and a lot of other nerds.

It's White House Correspondents Dinner night in Washington -- an evening dubbed "Nerd Prom" that's either loved or hated for its celebrity-gawking, over-the-top glitz and competitive party-going.

Here's some tweets from the event as the festivities began.