This airheaded cheerleader movie tries to be Clueless, director Amy Heckerling’s wise and witty high school spoof, but it ultimately comes off as lower-case clueless, especially whenever the dialogue tries to mimic “hip” teen talk (“Missy’s the pooh,” captain Kirsten Dunst admiringly says about one of her teammates. “Take a big whiff.”) Eventually, the movie decides to turn serious at a climactic cheerleading competition – the only time when things get bad enough to generate unintentional laughs.