Texture, texture, texture—that’s the key to going from “haven’t washed my hair in a week” to a Chrissy Teigen–like topknot. Spritz Nexxus Hydra-light Root Lifting Mist for Oily Hair ($20; nexxus.com) on damp or dry hair at the crown. “Then zhuzh to create pieciness,” says Lacy Redway, celebrity hairstylist for Nexxus. Now, start to make a ponytail, but on the last loop don’t pull your hair all the way through the elastic, she says. Wrap the tail that’s sticking out around the bun and secure with bobby pins.