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This weekend, The Vampire Diaries star Nina Dobrev showed off her always-perfect coif when she attended an environmental benefit in Bel Air for her co-star and off-screen boyfriend Ian Somerhalder’s foundation. What’s the secret to her beach-meets-glam polished, bouncy waves? For the answer, her hairstylist Alicyn Blackman points to the the Black 15in1 Treatment ($20; black15in1.com), a formula that uses keratin and sunflower seed extract to leave strands shiny, frizz-free, and hydrated. “I applied the product from Nina’s roots to ends, then blow-dried her hair until most of the moisture was out,” she said. Blackman created additional texture with a medium-barrel curling iron, then sealed the style with a final spritz. Gorgeous!

Plus, find out what Nina has to say about her strands.

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