Medium hairstyles and short hairstyles can be just as much fun and beautiful as long hairstyles. The idea is to decide if you prefer your hair down or in an up_sweep. Either style will work for all hairstyles. Adding braids and flowers to medium hairstyles and short hairstyles will give you an elegant look that will not be like your every day hairstyle and you will be as charming and elegant as any one at the event.
Remember that hair grows forever, it doesn't stop. If you go out on a limb, drastically change your hairstyle and end up hating it, it can always be changed to something else, another style or color. Talk to your stylist to see if they have any fun celebrity hairstyles for you. You never know, they may have a style that they have been dying to try on you, but never had the opportunity before. Most hairdressers won't try to push a new style on you (nor should they), but if you ask, they love to share their creative side.