Depending on where you're headed, you may need an electrical adapter or converter for any devices you'll need to use, such as curling irons or blow dryers. Many countries don't use the same outlets or electrical voltage. For example, American appliances aren't generally compatible with European outlets, and vice versa. It may seem like a trivial detail now, but you don't want to be stuck getting ready on your big day without the use of any of your electric styling tools!
To be safe, you may want to pack both an adapter and a converter. An adapter is a device that plugs into the outlet, changing the shape of the plug. A converter changes the amount of voltage that comes from the outlet. Some resorts do have American-style outlets in their rooms, so check with your travel agent or hotel to see if you need an adapter before buying one.