In the world of beauty, trends are like a time machine, moving both forward and back. While I just returned from the whirlwind of 2009 Fall New York Fashion Week, I'm actually looking back on 2009 Spring New York Fashion Week, which I attended last September. Funny how that works. Glancing back through the various springtime looks, I started wondering about which ones will make the leap from runway to real world. So tell me: Which hair or makeup trend from the catwalks will make it into your warm-weather routine?