Bella Hadid, 19, looked like a sexy siren in a daring red gown at the Cannes Film Festival on May 18. Wow, what a dress! Her hair was in a gorgeous updo, styled by Jen Atkin. Jen broke down the look on her Snapchat. It’s super easy to re-create and would be perfect for a prom, wedding or any special event — SHOP the exact products Jen used in Bella’s hair below!