What to wear: This costume is for the Halloween minimalist. Embrace ripped jean cutouts so short you can barely see them and a nude strapless bra or tube top — did you think we were going to suggest you went sans top?! — to channel your inner Revival Selena.
How to act: Sexy, confident, and comfortable in your own skin. No one has any idea who you are or were; they just know you're super hot.