Exclusive! Get the Most Badass Brows of Your Life With MAC's New Line

To achieve this look at home, skip the creams and pomades in favor of a pencil. "Because this dramatic arch is so defined, I find that a pencil is better to work with," explained Roberts. "It's almost like you're tracing the eyebrow."

Grab the new MAC Cosmetics Eye Brows ($17, available in three shades) to fill in your arches: it's superskinny, which allows you to carefully sketch on each hair. To avoid an overly penciled-in brow, Roberts recommended that you use the product to "kiss the hair."

"You’re not pressing really hard, you’re just lightly enhancing," he clarified. "I’ll have clients trace their eyebrows just like it's a coloring book — trace it first and fill in really softly."