With Fashion Week's onslaught of street style (from NYC to London and now Milan) the trends forecasted on the Spring '13 runways are making their real-world debut. Such is the case with the sharp black-and-white contrasts we spied at Alexander Wang. Now, that impeccably chic color duo is making the rounds on a few very well-dressed Fall '13 showgoers. It's a classic palette that's getting a modern reinterpretation on formfitting prints, striking jackets, printed tees, and all kinds of luxe texture (like furry toppers and slick leather skirts). For a look at the Spring trend in action, these snaps should set the right tone for your own outfit inspiration. Click through for a look at our favorite black-and-white street-style moments - then shop the trend with our editors' picks.