Nurses, French maids and witches are nice, but sometimes a girl wants more couture in her costume. Style icons like Michelle Obama, Beyonce, Rihanna, Naomi Campbell and newbie Willow Smith give you just that. We've pulled together five costumes based on some of their most popular looks. You may not be the scariest -- but you'll certainly be the most stylish girl in town. Here's what you had to say: Clarissa commented via Facebook: "Anybody can create Rihanna's look for cheap. Even though you may not have the exact same pieces, you can make it work." Patrice wrote via Facebook: "I don't need a celebrity costume. I am my own celebrity."