It's October 1st, which basically means it's Halloween! If you're anything like me and my friends, we're always on the search for cute but easy costumes. So here's a few ideas for simple, DIYable, and Insta-worthy costumes. The best part — a lot of these incorporate pieces that you probably already have in your closet!

1. Unicorn

A basic white dress with a unicorn horn headband (which I found at H&M and Forever 21) is all you need for a unicorn costume. Top it off with a sparkly eye look and some white tennis shoes. If you want to add a fun touch, try rainbow fishnet tights!

2. Sugar Skull

The makeup is what makes this costume. All you'll need is white face paint to draw the half skull on your face and the bones down your arm (or, you can get temporary tattoos for this part). For the rest, you can just use eyeliner and eyeshadow, and play with different rhinestones which you can stick on with clear eyelash adhesive. For the outfit, just stick to all one color.

3. Vampire

All this costume requires is an all-black outfit with thigh high boots. This is the perfect excuse to pull out that wine lipstick you've had no occasion to wear to. Throw on a black leather jacket if it's chilly or you don't want to show as much skin. Katherine Pierce from The Vampire Diaries is the perfect inspiration for makeup and hair!

4. Alien

Look for anything holo, metallic, and shiny. Put your hair in space buns, add glitter, and an alien antenna headband. Another option is galaxy leggings (you can find these on Amazon) with a white or black crop top.

5. Alcoholic Drink

There are several ways to do this costume. You can get an oversized t-shirt of your favorite alcohol and wear it as a t-shirt dress. Or, you can wear an outfit that's the color of the drink, print out the logo online, and iron it/clothespin it on. Throw on some knee high socks that match the colors and some tennis shoes, and you've got your costume.

6. KISS

Grab a KISS t-shirt (or any rock band) and cut it up any way you like. You can wear this with black bottoms of your choice. Fingerless fishnet gloves is a great addition, and you can't forget the face designs which you can draw on with black eyeliner (make sure set it with translucent powder so it stays put).

7. Boxer

All you'll need for this is a sports bra with Nike pros or gym shorts and sneakers. Grab a silk robe for overtop. I think boxer braids looks great with outfit, and you can use purple eyeshadow under your eye to mimic a bruised eye.

8. Victoria's Secret Angel

Going off of the last costume. Just tie the robe in the front and get a pair of small angel wings and you have yourself a Victoria's Secret Angel. This look wouldn't be complete without their signature big curls/waves.