What should I do for my 14th birthday?

I'm turning 14 in March (I think ahead..) and was thinking what I wanted to do for a birthday party. It's March 11th, and I live in Iowa, so it could be sunny and warm or snowy and cold. I know I want it all girls...cause my girl friends and guy friends don't really hang out together I guess. I know the obvious, like sleepover, hotel water park, shopping, movies, but what are some other things? Like maybe a concert? I don't know any that are going on though.