Even if you don’t wear foundation normally (I’m a tinted moisturizer girl, myself.), you will definitely want to wear some kind of base for Prom. There will be tons of flash photography, and the right base will help you’re your entire look last through the dancing and the nervous sweating (ew). Stay far away from anything with an SPF, because it will flash back in photos and give you the dreaded “Ghost Face.” I’m using L’oreal Infallible with a Smashbox primer. My particular bottle doesn’t say anything about SPF, but most of the bottles in stores now have SPF 18-20. If you can’t find this one, another great SPF free foundation is Clinique Perfectly Real.