While you might assume that Hailey Baldwin [1] only uses luxury products in her routine, that's simply not the case. The newlywed just revealed in the February issue of Elle [2] that she uses a drugstore product to care for her hair, despite having access to some of the most exclusive brands in the world. The cult-favorite It's a 10 Miracle Leave-In [3] ($13) is apparently her secret: "My hair is really fine so it gets knotty out of the shower. It's a 10 Miracle Leave-In conditioner works well at detangling for me and it's not too greasy either," Baldwin said. Now that you know the model's go-to product, you can use some of her best hair looks [4] as a reason to shop it ahead.