Courtesy of Herbal Essences

Herbal Essences spokeswoman Leighton Meester has her beauty routine down pat—but when it comes to her hair, she loves to experiment. For the brand’s latest ad campaign, the Gossip Girl star showed off a few of her favorite styles, and her hairstylist, Charles Baker Strahan, explains how to get each look in easy-to-follow videos. Want to know how to get serious volume, super-sleek strands, tousled waves, or old Hollywood curls (at right) just like Leighton’s? Click on the gallery below for the step-by-step process on how to get all four of her gorgeous looks at home.