Prettiest Mermaid Makeup

What you'll need:
-Highlighter
-Colorful eyeshadows (we used purple, pink, and teal)
-Glitter
-White liquid eyeliner
-Translucent powder
-False eyelashes
-Fishnet stockings
-A makeup sponge
And away we go...
In order to get the best outcome possible (read: to make sure your makeup doesn't look cakey), complexion prep is a must. The key is to start with a lightweight foundation, like Make Up For Ever Water Blend Foundation, that'll provide a smooth base for layering. Apply it with a damp makeup sponge so it's soft and airy, then set your base with a fluffy brush and light dusting of translucent powder, making sure to powder under your eyes to eliminate creasing. Next (and this step is very important) add as much highlighter as possible. "Put it all over," says Stewart. With another fluffy brush (we used the Make Up For Ever 122 Blending Brush) focus it on areas she called "points of intensity," in other words: your cheekbones, down the bridge of your nose, your cupid's bow, shoulders, and clavicle. After that, style your brows as you prefer to wear them; they won't be touched past this point.
No mermaid is complete without her mermaid eyes. We used two different purple tones here, but feel free to use whatever colors you want (pinks or blues would be dreamy here, too!). To make sure it lasts all night, apply a cream eyeshadow (like Make Up For Ever Aqua Cream) with your fingers first and layer a matching powder shade on top, focusing the darker color in the outer corners. For that super smoky effect, use a fluffy eyeshadow brush to blend the colors outward toward your temples. If you blend too much, you can always go back in with the darker color. (See here and here for two more basic - but still gorgeous - smoky eye techniques if you need them.)
The key to making winged liner look more mermaid and less cat? Opt for a vibrant white liquid liner on top. "It won't work unless it's liquid," says Stewart, noting that a pigmented, non-streaky option is crucial. Next, apply a regular white pencil eyeliner on your bottom waterline to open up your eyes. Warning: If you're not used to wearing anything there, it might feel odd for a few minutes, but that'll pass!
If there's any time to give the ombré lip trend a go, it's Halloween. All you need are two colors - we used blue and white - but pink would also be cute here. Start by applying the darker shade in the outer corners of your lips and blending it inward. Then, take the lighter shade and dab it in the center. Blend it out with your fingers and top it off with some highlighter in the middle..
Now for the fun part! For life-like mermaid-looking skin, dust a light layer of teal eyeshadow with a small powder brush in the places you would normally contour; so, the hollows of your cheeks, along your hairline, and underneath your jawline. And don't be afraid to get creative with it. Add some color underneath your eyes, your nose, or your neck and shoulders.
This step is optional, but really makes the mermaid feel come to life. Take a clean fluffy brush and dust it on top or adjacent to the teal shadow you put on before. Don't have pink eyeshadow handy?
And finally, the part we warned you about: the scales. This step requires some patience and (likely) a friend. Take fishnet stockings and stretch them out to your desired scale size. Have a friend hold them in place while you pat on your desired color (here we used white eyeshadow) with a damp makeup sponge or a dense brush. To really make it pop, choose a cream formula. Let it dry for about five minutes, but after, lock it in with a translucent powder.