I read the script for Jennifer's Body. Like, a while ago. It's very easy to find. Anyway, I've heard all kinds of "OMG so many pop culture references! Damn U Diablo Cody!!!!" snark, and... that's not really true, to be honest. The script is only okay, though. Like, it just seems like it's a generic horror movie, and say what you will about Juno, but that movie was not generic. Oh, and the violent scenes seem very violent. I'm squeamish, so...
I don't think this movie would be getting the hype it's gotten if it wasn't called Jennifer's Body and the body in question wasn't Megan Fox's. She's gross, though, so... yeah.