It's a tough job but somebody's got to do it!  Kate Upton, Cameron Diaz and Leslie Mann are in the Bahamas shooting a new film, and took some time off to relax on the beach.

The three bikini babes splashed in the surf, while enjoying drinks from their hotel's beach bar.

Sports Illustrated cover girl-turned actress Upton, 21, was in a itsy bitsy red triangle string bikini, while Cameron and Leslie - who are both twice her age -- wore two piece suits that offered a bit more cover.