What should be my birthday outfit?

So my birthday is now less than two weeks away. It’s my first birthday I’m ever spending at Disney World, at I went with picking Magic Kingdom as the park to spend it at. But now I am not sure what character to theme my outfit around. The shortlist at the current moment is Minnie Mouse, Ariel, Belle, or finding a cute birthday themed shirt/skort dress with matching ears. I’m so indecisive. 😭