Every now and then, a movie comes along that looks so spectacularly, cosmically bad that you fear for the sanity of its producers. What Happens in Vegas? Nothing surprising: Its a clunker of a title, and the films premisecareer woman Cameron Diaz and laid-back, laid-off Ashton Kutcher meet cute in Las Vegas, drink themselves silly, get married, and promptly win $3 million from a slot machinestrains credulity, to say the least. During a custody battle over the money, an activist judge played by Dennis Miller sentences the two to six months hard marriage, which somehow entails Diaz moving her smoothie machine into Kutchers apartment while the two endure weekly marital-therapy sessions with Queen Latifah. Theres not much here that makes sensewhy is Kutchers unemployed carpenter living in a sweet DUMBO apartment, while Diazs hard-driving Wall Street type is homeless?but the stars, despite having only a fraction of the charm and talent of the classic sparring-but-really-meant-for-each-other duos, know how to mug for the camera and well up on cue, and somehow that turns out to be enough to carry this trifle. Charming Brooklyn location shots help things along, as does Rob Corddry, who, as Kutchers best-friend-cum-lawyer, is crafty enough to cancel out his buddys guileless, cowlike brown eyes. — Julia Wallace