Brows can make or break a beauty look—just ask YouTube guru AlisonLovesJB, who always gives her arches "a little somethin'" no matter what look she's going for. Here, the vlogger shows you how to frame your face using Maybelline New York Define + Fill Duo, a double-ended tool with a pencil for defining your shape and a spongy side loaded with powder to fill and finish. Watch this step-by-step and discover why brows should *always* be part of your regimen. Follow Marie Claire on Instagram for the latest celeb news, pretty pics, funny stuff, and an insider POV.