Adriana Lima says the secret behind her luscious locks is not "over-washing" her hair.
The 34-year-old model - who has been a Victoria's Secret Angel since 2000 - credits her healthy diet and skipping shampooing for her stunning shiny hairdo.
She said: "If you have dry hair, don't wash every day. And if you have very, very dry hair, wash once a week! The oils help your hair look better."
"Everything that goes into your body is going to show up on the outside. You're going to see it in your skin and your hair and your nails."
And one hair hack she lives by to keep it feeling "super-shiny" is flax seed oil.
She told website Celebrity Health & Fitness: "If you want your hair to grow faster, you can take flax seed oil or a flax seed pill. It's great! It will make your hair super-shiny and it's going to grow fast."
As for her hot body, the mum of two - who's divorced from Serbian basketball player Marko Jaric - says she lost her pregnancy weight gain by following the popular Paleo diet, which allows you to eat proteins, healthy fats, vegetables and fruits, and excludes gluten, sugar, dairy, alcohol and junk food.
On her diet, Adriana - who has children Valentina, six, and Sienna, three, with her ex-husband - added: "I always like to eat healthy. I'm a mom, I have two kids, so I have to set a great example."