Diana Silvers wants to be the next Julia Roberts. She isn't the first newcomer to look up to the Oscar-winning actress, and she probably won't be the last, either, but on this particular day in mid-May, with two movies about to hit theaters, it's hard to argue with that clear-headed vision for her burgeoning career. In fact, for the first minute of our interview in the storied green room at Collider Video, there's even a little piece of a fig bar stuck in Silvers' teeth, which just feels like Classic Julia to me. …