Trivia: The Rolling Stone magazine that the headmaster finds in the library that reveals Mary Clarence's/Doloris' true self is one of the magazines seen in the credits on the first film.
Trivia: The student who says the "Yo Mama" joke about the Skittles is Whoopi Goldberg's real-life daughter, Alex Martin.
Chosen answer: A headliner is someone who receives top billing for a show or concert. She is the main attraction, and probably has a lesser known band/act perform before her, or "open for her".
Ral0618