First off, I really don't think anyone should watch this movie, because it was terrible.
That being said, our society is consumed by sexual and violent imagery in the media. If you disallow her to view this particular movie, she will assuredly be exposed similar material in the future without your supervision or purview. However, if you slowly expose her to this as she gets older, while strictly disagreeing with its messages, she might have a chance to be well-adjusted to our violent and sexual culture and yet still not consumed by it.
You're never going to be able to stop her from watching this sort of material, but if you set a good example in the future, she won't want to.