"I know what boys like, I know what guys want" - Redbanded JENNIFER'S BODY!
I'm sure I've seen this concept played out in an episode or two of Buffy the Vampire Slayer but nevertheless it's pretty fun to see Megan Fox in this kind of role, a one that plays on the power of her amazing physic over men, and actually places such an attractive girl as the villain of the piece. An old Joss Whedon trait if there ever was one. And honestly, I find it a little easier to stomach that Fox is a dumb cheerleader as apposed to a chick who knows her way around the inside of a motor. 
20th Century Fox have released a trailer for the movie, the second film based on a Diablo Cody script (the first being the best original screenplay Oscar winning Juno) and directed by Karyn Kusama (Aeon Flux, Girlfight).