Before And After: Vanderpump Rules Star Stassi Schroeder! Vanderpump Rules has quickly become a popular show focusing on young adults working at Lisaâs popular restaurant as they try to pursue there dream of making it big. One of the stars is Stassi Schroeder who is known as the mean girl of the show! Stassi is a beautiful girl but not to be messed with! Check out these photos of Stassi before and after!