Cameron Diaz was seen on the set of her new movie, What Happens in Vegas, in New York City. According to IMDb, the plot summary is:

Set in Sin City, story revolves around two people who discover they've gotten married following a night of debauchery, with one of them winning a huge jackpot after playing the other's quarter. Unhappy pair try to undermine each other and get their hands on the money -- falling in love along the way.

In other Cameron news, sources close to Cameron say that she is now dating actor Bradley Cooper. Wait a second, wasn't she just out on a romantic date with John Mayer? Here are some shots of Cameron with Ashton Kutcher.