Cameron Diaz has been full of smiles these days, thanks to her new beau Paul Sculfor. But since celebrities are constantly being photographed, it's easy to make assumptions that their beaming appearance is due to that special someone. But just as people say pregnant people glow, those newly in love often really do have it written all over their face. Does this notion ring true for you? When you're truly happy, does it shine through from the inside out?