What to be for Halloween!

This is the question! A few years ago I was a showgirl for Halloween and I kind of want to do it again but better! This is what I am thinking.......

Found a corset for $20 that looks pretty close to this and then all I would need to do is sew on some feather boas! I think it MIGHT work!

Now the next question is what would Derek be? Something Vegas themed? It seemed WAY easier to decide what you wanted to be when you were little,and now its a lot harder! And I am not into your typical police officer or scandalous looking animal costume....Sorry for those who are but come on get more creative! :)