If your hair is long then good solution is to wear your hear twisted up, to frame your face perfectly; this is almost a must if you wear strapless dress. Another good solution would be to have your hair blow dried and then curled at the bottom. This type of formal hairstyle look amazing with a diamond trimmed headband. Alternatively half a section can be pulled back, this way you achieve that the bottom section is still curled.
If your hair is shorter, then you don't have so many solutions for your formal hairstyle, but then again you also don't have so many problems with choosing the right combination. You can get perfect short formal hairstyle with just a few little improvements. You can try to blow and dry upside down (this will give you extra volume) you can also use some accessories such as headbands or sparkly clips.
Hope this tips will help you to shine with your amazing modern hairstyles.