Beauty Eva Mendes and Naomi Watts Are Pantene's Newest Celebrity Ambassadors! By Marianne Mychaskiw Marianne Mychaskiw Instagram Marianne Mychaskiw is a New York-based freelance writer, editor, and lover of Britney Spears who covers everything from beauty and style, to wellness and entertainment. A graduate of St. John's University, Mychaskiw was a previous staffer at InStyle, working her way up from intern to associate beauty editor — so you already know she will never leave the house without slathering on mineral sunscreen. InStyle's editorial guidelines Published on May 5, 2011 @ 04:47PM Pin Share Tweet Email Photo: Courtesy Pantene Eva Mendes and Naomi Watts have new gigs to add to their resumes: Pantene's celebrity ambassadors! Mendes will be the face of the Pantene Breakage to Strength collection, which helps to repair split ends, white Watts will be the spokesperson for the Flat to Volume line, formulated to give extra body to fine hair. "I want to let women with fine hair know that achieving beautiful, voluminous hair is possible without damaging your hair or adding extensions," Watts said of her campaign. Starting in July, the actresses will appear in TV and print ads for the brand, but you can get a sneak peek now! "There were no tricks on the set of the photo shoot," Mendes said. "Each look was natural and never manipulated, and my hair looked healthy and beautiful for each shot." Click through our gallery to get a behind-the-scenes look at their photo shoot.