What should i wear to school?

tomorow is casual clothes day, probaly the only one in the whole year. and its the only day that we can wear jewelry, nail polish and wear our hair down to school. so i want to make it fun. the only rules are: no jeans with rips/holes, no singlet tops or anything, no mini shorts, and no showing too much skin. so any ideas for clothes, hair, jewelry or anything? thanks :)