Meg Ryan (with the help of Sally Hershberger [1]) first made the shaggy hairstyle famous back in the '90s, and this style is now more popular than ever. Celebrities like Kate Moss, Sienna Miller, and Cameron Diaz all opt for this low-maintenance look. It's a great style for summertime since it doesn't require a lot of effort and it's fairly simple to achieve. Don't believe me? Just follow my three easy steps below.

• STEP 1: Dry hair with a blow-dryer (sans nozzle) until it's 80 percent dry.
• STEP 2: Divide hair into six to eight different sections and twist it away from the face. Secure the twists with a clip and let it air dry the last 20 percent of the way.
• STEP 3: Take out the clips, flip your head over, and shake out the twists. Then, flip hair up and finger-comb a part. You'll notice little ridges in your hair. This creates a clean, but just-out-of-bed, low-maintenance, sexy look.

Source [2] and Source [3]