What should I wear for my birthday, a fancy dress/little black dress or ugly Christmas sweater with kitties on them with my Santa hat?

I feel I only turn 25 once, so why not get a fancy dress? But then I think, but I'm going for BBQ in the winter and I'll only wear it once. But then I think, fireball shots, shots, shots and Cards Against Humanity, better dress up.

Hm, what do you think?