21 last-minute Halloween costumes that are ridiculously easy to make

All you have to do is contour your face without blending it out, throw on some concealer, and accessorize with a makeup sponge or brush. The best part? You can wear anything you want.

Just throw on a blue hoodie; sunglasses; and a sign that says, "She doesn't even go here!"

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This one's pretty straightforward and great for couples, too. Just wear anything you have in your closet that's made of or looks like denim.

Just throw on an all-pink ensemble and maybe some pink sunglasses or pink accessories to match.

All you need is a black blazer or jacket, white top, plaid skirt, white knee-high socks, and lots of shopping bags.

Arguably one of the most recognizable movie outfits of all time, Sandy's edgy, all-black ensemble at the end of "Grease" is easy to recreate. Just throw on black skinny jeans or leggings, a black off-the-shoulder top, a black leather jacket, and red lipstick.

Put on a black-and-white striped shirt or dress, bright red lipstick, white gloves, and mime makeup.

This costume will work best if you have a plaid shirt, overalls, and cowboy boots. But you can also just draw some seams and patches on your face, and head out the door in whatever you want to wear.

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To recreate this look from the famous "Risky Business" dance scene, throw on a long white button-up, shorts, tube socks, and sunglasses.

This chic look from "Breakfast at Tiffany's" will keep you comfortable all night long. To complete the outfit, add a sleeping mask, some dangly earrings, and lots of mascara (or false lashes).

To recreate this iconic movie look, you and your partner will need a pale pink dress, a black T-shirt, black jeans, and black shoes.

All you have to do is throw on a black dress and stick your leg out very, very, very far away from your body — especially when you're taking photos.

Just choose a sport, don the appropriate athletic gear, and draw on a tattoo of the Olympic rings. You can even create a silver medal using aluminum foil.

If you want to turn some heads this year, turn yourself into a contestant from ABC's "Bachelor" series. Just throw on a beautiful gown or a fancy suit and add a red rose.

The "no pants" trend is everywhere lately, and, luckily, the look is easy to achieve.

Just throw on an oversized blazer, jacket, or sweatshirt, and head out the door. If you want to create a pants-free illusion, you can also opt for a pair of bike shorts.

If you need some inspiration, check out this list of the wildest hats guests wore to Prince Harry and Meghan Markle's wedding in 2018.

This one's especially easy if you've ever been to a music festival. Check out these over-the-top celebrity looks to get the ball rolling.

To dress up as the comic book icon, throw on a tight black top, tight black bottoms, black shoes, and black gloves (if you have them). You can also draw on a mask with makeup.

You can quickly use makeup to distort and exaggerate your features. All you really need is white eyeliner or face paint, red lipstick, and black eyeliner.

Instead of making this cute DIY costume with white yarn and hot glue, you can just attach white clothespins to a green dress, top, or sweater. It'll save you a ton of time and still look adorable.

You'll need a red bandana, a blue top, and some red lipstick.