"I love lashes," Ariana told Byrdie. "I feel like I could be completely naked but have lashes, and I'd be fine." Chinchilla curls Ariana's lashes with the cult-fave Shu Uemura Eyelash Curler, $22, and applies a generous amount of a thickening mascara, like her favorite M.A.C. Haute & Naughty Lash Mascara, $24.