A Happy-looking Cameron Diaz, newly single after her split with Alex Rodriguez, dined with Gwyneth Paltrow Sunday night. After wowing fans on the red carpet in a black-and-nude Pucci dress at the Emmys, Paltrow headed over to Scarpetta in Beverly Hills to meet Diaz. A spy told us, “Cameron was smiling and chatting to Gwyneth, and flashed a big smile at some of the other diners in the restaurant.” They were later joined by others including Rob Lowe.