Cameron Diaz stripped down to her white bikini for a boat ride in Miami with Alex Rodriguez Saturday. Alex and Cameron spent a weekend down in Florida, where they're apparently building a home together. They wrapped up their fun on the water by hitting a grocery store. Alex was able to spend a few days with Cameron, because he has time off from the Yankees season. He recently had knee surgery, which could keep him out of play until mid-August. He most recently missed out on a games against Oakland and Seattle, though yesterday's game was still a win for the NYC squad. Cameron, meanwhile, isn't sitting out on much movie-wise. She was just in London filming Gambit, and next up will start shooting What to Expect When You're Expecting.