It's amazing how quickly this spot (being The Palms, of course) filled up. We're talkin' double capacity in, like 12 hours, though no one really keeps time in Vegas; it simply ISN'T done! And now the joint is jumpin' with wall-to-wall celebs. And speaking of... we just stopped by Chris Brown's rehearsal. Of COURSE we could tell you what happened, but we'd be on the next flight back home for spillin' the secret sauce. So... let's just say he's definitely gonna deliver the goods when he performs on the VMAs Sunday night. We also spotted Lil Wayne backstage, protected by a bodyguard who's about 17 times his size. And we espied Boys Like Girls' Martin Johnson, fresh off the stage of his poolside set, cooing over a police guard dog. Ka-ching!