“Sex Tape” star Cameron Diaz and her boyfriend Benji Madden enjoy a sun-filled afernoon on a mega yacht in Antibes, France on July 25, 2014. Cameron showed off her bikini body as she laid out on the deck while Benji lounged nearby. Earlier, the couple took a dip in the water where Cameron looked terrified! What was making her so scared? Did she see a shark? Was she worried about drowning? Or maybe the water was just too cold?