A runaway hit, this Fall 2011 limited-edition nail lacquer quickly became the unofficial shade of the season, with editors and fashion leaders wearing it in every major city. Like any good holographic polish, it begs the question, Is it gold or is it green? The stunning yet edgy combination of brassy hues serves as an eye-catching neutral metallic that will pop—and look unique—on every skin tone. Stock up before it’s gone for good. $25