Something must be in the water at club Butter because the stars looked absolutely giddy to be hanging out!  In all honesty, I don't think I've ever seen Jay-Z smile this big, usually he's got his "cool" face on, much like his pal Kanye who of course acted like he was over it. Maybe Kanye should have just stayed home, cuz like they say on Gossip Girl, "The only thing cooler than going to Butter, is not going to Butter." 
Sharing smiles with Jay were SNLers Will Forte and Seth Meyers, who struck an Olan Mills like pose for our photogs (Lindsay Price strode along side them).  P.Diddy was somewhere in the middle acting neither elated nor smug, mostly just fashionable.