This is one of those costumes you'll wear over and over again, even in real life. Don't forget to add a middle part, of course. American Apparel Tent Dress, $82, store.americanapparel.net ...

What's cuter than a set of twins wearing matching outfits? A dynamic duo wearing adorable Halloween costumes for twins, of course! Whether they're for boy-boy, girl-girl, or boy-girl duos ...