Freaking convention outfits

Ugh I have to go to a convention tommorow and I just remembered today so now I don't know what to wear how to style my hair AND I freaking decided to wear a beautiful mask, kinda like those parties they show in movies based on old times where they are wearing a mask so no one knows who they are and they are pretty af with feathers and sparkles, also kinda like the ones in the music video of it's better if you do by panic! At the disco, anyway bcs of that mask idk if I should put my hair over it, under it or just straight up put the mask on my head like a hat (reasonable crash out in my opinion) and also it's so fucking hot in Italy rn