It's done by applying highlighter on the areas of your face where the light would naturally hit — cheekbones, brow bones, the cupid's bow, and chin. (nancysfashionstyle.com)
The key to a smoky eye is to «lift» it, by applying a highlighter underneath the eyebrow. (rockpaperglam.com)
I like applying this highlighter with a fan brush or a small tapered brush. (makeoverly.com)