Julia Roberts caused quite a stir at the self-service Yogurt Stop in West Hollywood on Sunday afternoon. When she walked in alone, witnesses said, everyone was awestruck, silently gaping as she selected the mango flavor. “The second she left, a man burst into tears and then bought mango just like Julia had,” said a source. “Then he fished her napkin out of the trash.” No doubt he’ll sell it on eBay, if he can bring himself to part with it.