Primer, people, PRIMER!
I have combination (oily/dry, but mostly oily) and acne-prone skin. I have enlarged pores on my cheeks which I would LOVE to have reduced with the perfect primer. Also, since my skin is oily/acne prone, it can't clog my pores and make my acne worse. So I need something that will help tone down the oiliness on my face and keep my makeup on all day long