Name ONE affordable makeup brush that you can't live without.
Since the question is to name ONE, I'm going to have to go with the e.l.f. Studio Small Stipple Brush ($3). When this brush first became available in-store at Target, I immediately bought one and now I have three. I use it for applying my blushes (so wonderful for pigmented blushes like the Milani Baked Blushes, since it gives you so much control) and also for applying my setting powders. I love that I can really get into the little areas of my face like the sides of the nose with this brush, and it never deposits too much (or too little) product. Aaaah, I would be lost without this brush!