If you're going to wear one product on a hot summer day, make it lipstick. Whether you go bright, nude, matte, or frosted--seriously, it's making a comeback--leave your hair alone, slather sunscreen on your face, and let your lips pop. We asked a few of the season's busiest actresses to fill us in on their go-to summer shades. What are your summer favorites?

Clockwise from top left,

Rose Byrne, Nars Lipliner Pencil ($22) in Jungle Red with Nars Lip Gloss ($26) in 413 Bleecker Larger Than Life

Anne Hathaway, Chanel Rouge Coco Lip Colour ($32.50) in Rivoli

Lucy Hale, Chanel Rouge Coco Shine Lipshine ($32.50) in En Vogue

Marion Cotillard, Tom Ford Lip Color ($48) in True Coral and Dolce & Gabbana Precision Lip Liner ($30) in #5 Fire

Chloe Sevigny, M.A.C.Lipstick ($14.50) in Lady Danger