Penelope CruzTHE LOOK Voluminous Bombshell hair HOW-TOThree elements will help get this kind of volume: a volumizer applied to wet hair; blow-drying the hair 75 percent of the way with your head upside down; and creating a zig-zag part once the hair is dry. Use a large round brush to blow-dry the hair when you flip it back up. Flip back over and apply hairspray, then create the haphazard parts in the hair. INSIDER TRICK Don't have enough hair to pull this look off? Try extensions! BUY ONLINE NOW Sunsilk Daring Volume Spray-on Mousse, $3; drugstore.com.