Rihanna was in her black two-piece yesterday to take a swim in Hawaii. The pop star treated herself to a bikini-filled day by the water while off doing reshoots for her upcoming blockbuster Battleship. There was a slight controversy after her costar Brooklyn Decker spilled the beans about their return to the set, but apparently working this month was part of the production schedule all along. Rihanna also spent a good chunk of her Summer on the Pacific islands working with Alexander Skarsgard and having more chances to take a dip. Her foray onto the big screen comes during a busy time for her musically. Rihanna released the new video for her single "S&M" yesterday — check it out and let us know what you think of her latest racy clip.