Hailey Bieber swears that the reason for her glowing skin is THIS Strawberry Glaze Skin Smoothie, which roughly costs between $18-$20, but here's the recipe to make at home. ⁣ ⁣ #HaileyBieber #Smoothie #JustinBieber #Biebers⁣ ⁣ 📷: Getty Images