But then, at the stroke of midnight, Gaga shared a passionate kiss -- not a "friend" kiss by a longshot -- with a dark-haired, bearded dude named Michael. We don't know who he is, but Gaga sure does. She and Michael left hand-in-hand into the Vegas night.
As for Michael's identity ... don't know. It's not Bradley Cooper, so we're well down the road of process of elimination.