Among Gigi Hadid?s stunning features, her brows remain one of her best. The models eyebrows are always defined and groomed but seldom overdone or severe. Hadid?s makeup artist Erin Parsons has shared her secret formula to defining and shaping the supermodel?s brows. The product Parsons uses is the Maybelline Tattoo Studio Brow Tint Pen in the shade of Soft Brown. Parsons explained that it goes on with a micro-bladed hair like stroke.