Christina Milian celebrated her birthday at Supperclub in L.A. last night, and her celebrity besties Karrueche Tran and Amber Rose were in the building to celebrate with her, as well as Kae’s boo Chris Brown, Amber’s homie Quincy (Diddy’s stepson) and more. NOT spotted, however, was Lil Wayne – which is interesting, since he’s off tour and likely back in L.A. putting the finishing touches on Tha Carter V. Hmm! Could that Dhea situation have thrown a fork in things? More pics in the gallery.