With all the excitement over the models, celebs, and designers stalking the red carpet tonight, it's easy to forget that tomorrow the Model As Muse exhibit opens to the public. New York's fashion director, Harriet Mays Powell, got a sneak peek today with Costume Institute chief Harold Koda. And who's that surprise guest popping in? Oh, just Twiggy. Take a walk back through modeling memory lane and see if you can spot your favorite photos and poses.