Diana Ross threw a supreme hissy fit at restaurant La Scala in Beverly Hillsafter she was not allowed to sit at a table until her daughter showed up. The restaurant has a policy against seating anyone until their full party arrives. But Miss Ross sat herself down at a corner booth anyway. Management came over to explain their seating policy, and said that if she cut the line, she would not be served. But Ross didn’t budge. Sources say that when her daughter finally arrived the pair got into a heated argument with the management before storming out.