For the base of a cat costume, all you need is black pants or leggings and a black shirt. Add a pair of kitty ears (anyone with a little girl in the family probably has some), and pin on a tail.

Sure, the cat costume might scream "last ditch effort," but it's definitely a classic. First off, everyone will recognize what you're trying to pull off. ... Cat Tail, $6, Amazon.

This is the laziest DIY costume on the list, that’s for sure. ... What You’ll Need: Cat ears, a cute outfit, a tail made out of a piece of ribbon or rope, and a dark marker ...