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Where did half of Hollywood go after the Maxim party? Crown Bar, of course!

The hot spot saw the likes of various celebs Wednesday night, including Brit's old pal Alli Sims (in a leopard-print dress), Audrina Patridge (who didn't stay long as her friends weren't allowed in), Nick Lachey (sans Vanessa), Lauren Conrad (with Lo, not Audrina!) and even the epitome of grace, Mary Carey.

In fact, there were so many stars and starlets out last night that we put together a gallery for your viewing pleasure...

CLICK HERE FOR THE GALLERY!