Get the scoop on the double-duty potion Jennifer Aniston uses, the mascara that Eva Longoria swiped on at Cannes and more star-adored look-pretty goodies

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Stars like Ashlee Simpson and Olivia Munn rely on this "magic potion" for shiny, healthy hair – so named because it's a multi-tasker formulated to treat any type of hair. "It gives shine, eliminates frizz and has SPF. Everyone that uses it truly sees results," says celeb stylist Louise O'Connor.