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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JESSICA SIMPSON

How to get the look:
1. Apply mousse and blow-dry with your hands, then scrunch it under a diffuser.
2. Use a curling iron to emphasize the loops. But "don't do every curl – you'll achieve a look that's too set," says Arrojo.
3. Blow-dry the front with your fingers, and "get a little bit of a flick" with the curling iron. Finish with a detailing mist or high-shine hairspray.

Bonus tip: Lightly tease the crown of your hair with a bristle brush. "That'll give you nice body and it'll stay the night."

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