Now that you've got your outline in place, it's time to pile on the black shadow and liner.

Step 7: Waterline your upper and lower lash line using a black liner to really make your eyes pop.

Step 8: Stapleton added water straight to the container of M.A.C. Creme Liner, $16.50, in Black, which created a creamy gel that applied inky black. He then used a small, tapered M.A.C. Eye Liner Brush, $20, to paint on the liner, following the stencil he created earlier.

Once both eyelids have been filled in, use a liquid liner (Stapleton used M.A.C. Penultimate Eye Liner, $21) to go over the edges of your shadow to make sure it looks supersharp. Sweep a black eye shadow, like M.A.C. Eye Shadow, $16, in Carbon over it to set it.

Pro tip: To prevent fallout, hold a fluffy powder puff (the kind you would get with pressed powder), underneath your eye as you apply shadow. It won't mess up your concealer, and will catch any stray shadow.

If you make a mistake, dip a Q-tip into an eye cream (Stapleton recommends M.A.C. Fast Response Eye Cream, $31) to clean up. This will fix any smudges or wonky lines without disrupting your foundation or concealer.

(Note: If you have a lot of space between your lids and your brows, you can use a brown shade under you brows to create the illusion that your brows are further down, like Swift's.)

Step 9: Using the gel liner you mixed up earlier and the tapered brush, apply a thick line of black liner along your entire lower lash line. You want it to be thick enough to fall below your lashes, so that when you add mascara it won't disrupt the line.

Step 10: Use your liquid liner to outline the inner corner of your eye. Then add mascara to your upper and lower lashes.

Step 11: To create even more drama and round out the entire eye look, Stapleton applied M.A.C. 1 Lash, $17. These are a short pair of lashes that look natural, but create a dark line along your lash line, which Stapleton says is essential to this look. He then applied M.A.C. 2 Lash, $17 -- a longer, flared pair -- on top of the shorter lashes to create an ultra-feminine, flirty feel.

Stapleton finished off the fierce look with perfectly defined, ruby-red lips.

Step 12: Line your lips with M.A.C. Pro Longwear Lip Pencil, $20, in He Said She Said, a brick red shade. Fill them in completely, as if you were using lipstick.

Step 13: Top off the liner with M.A.C. Vamplify Lipglass, $20, in Tease Don't Touch. To make your lips extra pouty, take a powder that is a couple shades darker than your skin tone and dust it under your bottom lip.

Bring together your #squad, and you're ready to take down your enemies (or, you know, be the most badass b*tches at the Halloween party). And remember: Though Band-Aids don't fix bullet holes, they can patch up your feet after a night masquerading as a superhero in sky-high stilettos.

Makeup: M.A.C. Cosmetics Senior Artist John Stapleton
Jewelry: Rachel Katz Triangle Earrings