Katie Holmes has the best short hair style for prom. You can apply pomade to make it look piecy, you can flat iron it straight, you can wear it all over curly, messy....the options are endless

You could even add a jeweled tiara or hair clip to this style for that extra elegant look.
Part the hair deep on one side and blow dry the hair in place, sweeping from one side of the forehead to the other.
Add a small amount of pomade to the ends of the hair to define and put the layers in place. Wear this hair style with the white/black prom dress below and you will look and feel like a celebrity.