Partying in Las Vegas? Been there, done that. Partying poolside in Las Vegas? Pssh, that’s like a day ending in “Y.” Partying poolside in Las Vegas with a few (hundred) new friends while Nick Jonas, Chris Brown, Kelly Clarkson, Nicki Minaj, Shaggy, Echosmith and David Guetta perform live? Well, now THAT’S worth talking about. The rest….