As you might have seen, our sartorial-stalking skills are on point (to wit: lust-worthy shoes galore!). Today we train our scopes on all the coolest nails out there at the shows and on the streets this Fashion Week. From backstage to the runways, we've spied some mega-amazing manis—and we're not just talking nail art. Spring has ordered up an abundance of ways to get your lacquer on—both in terms of heart-stopping designs and gorgeous, single-hued shades—mixing can't fail classics with super-cool, inspiring artistry that really nails it. Here's to getting a perfect ten.