It's hard out here for a former supermodel in these Parisian streets.  Just ask Naomi Campbell who was violently attacked and robbed by thugs as she tried to hail a cab. Naomi was knocked over and robbed and suffered a torn ligament. “It was terrifying. Naomi believes the assailant had been watching her, casing her out, and waited for a moment to strike when she was alone. Her leg was injured as…