L'Oreal Paris Infallible Flash Cat Eye Waterproof Brush Tip Liquid Eyeliner
Bartlett opts to use the L'Oreal Paris Infallible Flash Cat Eye Waterproof Brush Tip Liquid Eyeliner ($8) to make sure liner stays put through the heat and contact with sunglasses. "I wiggle the liquid liner at the root of the lash and create a small wing following the lash line," she said. "The waterproof formula makes sure your eyes won't smudge."