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“It is the only hairspray that controls hair in the humidity,” says L.A. stylist Will Carrillo, who has used the product on Penélope Cruz’s locks. It “gives the most shine, especially for the red carpet,” says Brandon Martinez, a hairstylist in Los Angeles. Sebastian, $13.50, 10.6 oz.; www.sebastian-intl.com or 800-829-7322.