10. Not nearly enough Cool Mom
Amy Poehler steals her first scene as Regina George's tracksuited, self-identifying "cool mom" who announces to Regina's pals: "Happy hour's from four to six!" When Cady asks if there's alcohol in the drinks she's serving, Mrs. George deadpans, "No! What kind of mother do you think I am? Because if you want a little bit, I'd rather you do it in the house." She's a suburban Jenna Maroney with the crazy glance of Rob Lowe's character in "Behind the Candelabra." But aside from basically two other quick cameos in the movie, she doesn't get another big moment! For shame!