If Spears told us once, she's told us a thousand times: "There's only two types of people in the world; the ones that entertain, and the ones that observe." Her "Circus" tour look will definitely plant you firmly in the first category.
What to wear: A black leotard with knee-high boots and a red ringmaster's jacket. You will obviously need a top hat and riding crop á la Britney's "Circus" tour props. All eyes are on you in the center of the ring — after all, you're a "put-on-a-show" kind of girl.