Need advice on my middle school dance!?

ok so in about a month my school is having a Sadie Hawkins Dance. I already know who i am going with. Its a casual dance. So jeans and a nice shirt(something like this http://www.kohls.com/kohlsStore/saleevents/0130/juniors/3ds8topsactivewear/tops/PRD~755165/Fang+MockLayer+Striped+Vest.jsp) and flats is what im planning on wearing. My problem is my hair and makeup. I have naturally curly hair and green eyes and my skin is not pale, but not tan. If i straighten my hair, it will end up curling from where i sweat while dancing. What should i do? What about makeup? Any suggestions? Thanks so much i know this was a long question...(: