Photo SpecialStar Hair: Get the Look!

What Not to Wear's hair guru Nick Arrojo tells you how to style your tresses like Jessica, Sienna and eight other celebs. By Serena Kappes

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CHARLIZE THERON

How to get the look:
1. Blow-dry hair with a flat paddle brush.
2. Apply a thermal protector and use a flat iron to make hair smooth.
3. Spritz shine spray into your hands and finger through hair. "That will bring out the separation and texture," says Arrojo.

Bonus tip: For fine hair, use a volumizing product to add body or a blow-drying spray to prep the hair.

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