16th Birthday Party Theme?

I'm turning 16 in January, which in Australia is summer, and I have no clue on what to do with my party. I know I want a theme and I don't like beach themes or beach parties. Every site I look at has kiddy ideas for 16th birthday parties. I want a party that both girls and guys would enjoy, but it's really hard. I originally thought of having a 1950s themed party, but I know now-a-days guys wouldn't really want to dress up for that.

I saw one idea about having a crazy photo booth thing where you would have a black backdrop and have cool/random/crazy props and just pose weirdly and have fun. I want to include that in my party for sure as a fun thing, but I'm more concerned about what to theme my party to suit girls/guys. I need help finding a really good, cheap party theme for my 16th and have heaps of fun!

By K.J.