Star 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

SIENNA MILLER

How to get the look:
1. Use a volumizing product to blow-dry and tousle hair with fingers.
2. In the jar, blow-dry a small amount of pomade until it liquefies. Dab onto palm and apply "to create separation and texture," says Arrojo.
3. For a "more carefree look," use a curling iron to loosely loop the ends.

Bonus tip: "Add extensions to give your hair pieces of length in areas," he says.