Reviewed by GREG KING Director: Jake Kasdan Stars: Cameron Diaz, Justin Timberlake, Lucy Punch, Jason Segel, John Michael Higgins. Despite the title, this is not a black comedy along the lines of Bad Santa, in which Billy Bob Thornton played a store Santa Claus with a nasty streak. Instead, this is a moderately amusing comedy starring Cameron Diaz as a superficial teacher who has her priorities all …