White House Correspondents Association Dinner

Wow, I was just looking at the guest list and they included: George Lucas, Glenn Close Sting and Trudie Styler, Miranda Cosgrove, Kevin Bacon, Forest Whitaker, Jon Hamm, Eva Longoria Parker, Chris "Ludacris" Bridges, Brooke Shields, Alicia Keys, Kenneth Cole, Kerry Washington

I'm just wondering who paid for dinner? And how much did it cost?