Eilish's character in this tune is a murderous psychopath, making this a rather appropriate option for Oct. 31.
- What to wear: A yellow jumpsuit with cuffed bottoms, a matching jacket, and white high-top sneakers. To really up the ante, you can even lug around a red wagon and stack of cash (using Monopoly bills is probably a better option than the real deal . . . unless you have actual money you can just throw around, in which case I'll send you my Venmo username).