Contouring is completely optional, but if you wanna give it a go, Hector first highlighted Dani in the Match Stix Matte Skinstick shade French Vanilla. Your face isn't all one color and the light hits it at different angles, so the purpose of contour highlight is to basically accentuate those points of your face that are naturally lighter: forehead, under eyes, bridge of nose. In case you're thinking, "But I thought highlighter was the pretty shimmery stuff.", you're absolutely correct and we're gonna get to that! But there's also contour highlight, which should be about one to two shades lighter than your skin tone, and it adds dimension to your face.
He followed up with the shade Truffle, which also happens to be Rihanna's dark contour shade. To achieve a more chiseled look, Hector applied it onto her face a little higher than one might normally place the darker contour color. If you're reading this like, "But how TF do I do this?", apply product about two shades darker than your skin tone to your temples, cheek bones, jaw line, and the outline of the bridge of your nose, and then blend, blend, BLEND! If you're not a blend pro, dab your makeup sponge until the product is blended in; DON'T rub.
Get the Match Stix Matte Skinstick from Sephora for $25. Available in 20 shades.
Fun fact: The sticks are multi-use, and can be used however you want, from highlight to concealer to lip color. Truffle is one of the most universal shades. Even if you have a deep skin tone, you can use it as highlight.