18 Fourth of July Weekend Beauty Deals You Don't Want to Miss

Youthforia BYO Blush Oil ($25, originally $36)

Add a flush of color to your cheeks with the Youthforia's viral BYO Blush Oil. The green, color-changing blush oil reacts to your skin's pH to give you a customized blush with every use. It's buildable and blendable for a natural look — all you need is a few dots on the high points of your cheeks. One of our editors put it to the test, and says "the formula packs a punch in the pigment department, but after I used an angled brush to blend it into the apples of my cheeks and up my temples, it gave my face a soft, natural-looking wash of color." Read more in this review of the Youthforia BYO Blush Oil.