Model Erin Wasson made an appearance on Extra last night, sporting tousled waves that were perfect for our approaching Summer. Lucky for us, this casual look is easy to create. After washing your hair, create a part and rough-dry your hair with your hands (or let it air-dry). Once your hair is just slightly damp, spritz in a sea salt spray like O&M Surf Bomb Sea Salt Spray ($24.95) and work through with your fingers. Next, gently separate your hair into two halves and create loose buns on each side. Make sure to twist away from your face to get a flattering result. Just let dry overnight and wake up to effortless waves. For a dry-hair version, simply use the beach spray on dry locks, twist into buns, and use a blow dryer to set the look. Let your hair cool while you do your makeup, and there you have it: perfect waves.