Twilight
I had never heard of this book series because I'm not in touch with my 14 year old cousins.
I have no idea if the movie is good or not, but it's brilliant marketing and an obvious flick to make.
Here's a great review of it.
If you can't be bothered with the whole review, just enjoy this nugget;
"It’s impossible to know for sure what’s going on inside Edward’s head because Pattinson is a horrible, horrible actor, delivering his lines with a Keanu Reeves-esque look of panicked confusion, like a moose that’s just woken up in a space shuttle."