The 'tweenybopper moviegoer is unlikely to be savvy to the rote, one-dimensional nature of clich├ęs like catty in-crowd queen bees, cardboard cut-out dream boys admired from a distance, and underdog cliques of pretty, outcast Everygirls -- but that's no excuse for building a whole picture around such threadbare characters and the inevitable plots that go with them.

Yet that's exactly what happens in "Sleepover," the latest example of how Hollywood can strip a halfway decent idea of any originality by saddling it with tedious stereotypes and the false hope of easy, prepackaged solutions for young girls' adolescent problems.

It's a comedy in which four "average" junior high girls (Alexa Vega, Mika Boorem, Scout Taylor-Compton and Kallie Flynn Childress), typically nervous about being accepted, are challenged by four shallow, cruel, fashionista cheerleader types (Sara Paxton and three indistinguishable minions) to a one-night, sneak-out-of-the-house scavenger hunt. The winners get to eat lunch at the "cool" table when they go on to high school next year.

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