Sweet 16 Party

I`m having a party in a few months but i want to start planning now. But before i plan, i need a theme. I want something orginal and something that no one has done before. I`m having about 150-200 people coming so this has to accomidate everyone there. I was thinking about having a black and white theme and i would wear a vibrate pinky dress but i think thats not original enough if you any ideas to help me that would be great!