Need ideas to ask someone to prom...?

What are some ideas. I've been throwing a bunch around in my head which so far consist of: decorating her car, something involving a giant stuffed animal, writing it across her driveway, asking over the video announcements during school, treasure hunts, something with balloons, writing her a song, and leaving a box full of something (flowers, chocolate etc.) on her doorstep. Any other pretty uncommon creative ideas?