If Cara Delevingne is any indication, a well-defined brow is a trend that's not going anywhere anytime soon. So for those who wish to do a little something with their brows without looking like a drawn-on mess, Benefit Gimme Brow ($22) is your solution. This colored gel (it comes in two shades) is packed with little fibers that easily build out your brows for a fuller, thicker effect. Plus, the tapered wand is shaped for foolproof application. A few strokes shape and fill sparse areas, but layer it on for a more dramatic finish. And the best part is that it looks completely natural, not like some artistically penciled shape.