Photos of Cameron Diaz and Ashton Kutcher at the Premiere of What Happens in Vegas in Tokyo

What Happens in Vegas is out on DVD at the end of the month in the states, but Cameron Diaz and Ashton Kutcher jetted to Tokyo to do a press conference for their romantic comedy today. Both stars cleaned up nicely, with Ashton polished in his button-down and Cameron glowing in her little strapless number. In fact, Cam looks even more radiant than usual — maybe thanks in part to that hot model boyfriend? Cameron had to miss out on the first round of overseas promotion for the movie, but we always welcome a chance to see her endless enviable cocktail dress and hot shoes collections.