With prom coming near, I'd like to point everyone over to Polyvore which is a website where you can put together outfits. It's good reference for your characters and just putting together their wardrobe for the hell of it! We also have a
Cape and Cowl (NOW WITH THE RIGHT LINK) group, so you can share your creations!
Alternatively, you can draw/have someone draw your character in the outfit which I am always free to do I need to exercise my drawing muscles