A huge part of Halloween is the makeup. You can completely transform a look with just a little bit of eyeshadow and even some lipstick.
Aliza Miklos of Aliza Noelle Beauty, LLC showed off some makeup looks that you can try at home, like a spooky skull and mermaid.
Use cheap art brushes from the dollar store.
Use fishnet stockings for mermaid scales.
Use makeup you already have at home.