You can't choose where you will lose fat from first, but if you do follow a low carb diet, or Phase 1 of South Beach, you will lose inches on the belly because of depleting your glycogen reserves, which are stored in water that is retained in this area. If you do this, beware in the days before the wedding to not eat sugary or processed foods because your water weight will return when you start to eat sugar and processed carbs.
Don't forget to drink plenty of water and exercise!