X-Tina: Baby Poppin' to Club Hoppin'
She gave birth only three months ago -- but dirrty girl Christina Aguilera already is back on the club scene, hitting up Villa with hubby Jordan Bratman.
Also in L.A.: Bobby Brown took flight with his girlfriend, Lindsay Lohan held tightly onto her water, Rihanna explained her new tat and Arnold sucked on a stogie.
In NY: Ashton and Demi partied after his SNL gig with Cameron Diaz, Lucy Liu, Diddy, "Idol" loser Michael Johns and a poop-dodging Blake Lively.