Taylor Swift's "Bad Blood" music video starred essentially every member of her #squad, and they all looked amazing. So, naturally, Miss Swift and her Bad Blood crew top the list of the best group Halloween costume ideas for 2015. (Because, seriously, who doesn't want to wear killer makeup and a badass outfit?)

We've got mad love for Taylor Swift (aka Catastrophe) sporting red hair, ruby lips and a fierce-as-hell cat eye as she prepares to battle Selena Gomez and her band of fiends. So we tapped M.A.C. Cosmetics Senior Artist John Stapleton to help us recreate her dramatic makeup -- just in time for Halloween. Here, how to do Taylor Swift's "Bad Blood" makeup.

Jewelry: Rachel Katz Triangle Earrings (Yes, those are the exact ones Swift wore in the video.)

Though she's walking in front of explosions and preparing for battle, Catastophe's skin still looks radiant. A solid base is necessary to carry out the rest of her dramatic look.

Step 1: Start by prepping your skin with M.A.C. Mineralize Moisture SPF 15 Foundation, $36. Stapleton says this will give you the glowy look you need and provide coverage without looking cakey.

Apply it with a duo fiber brush (he used M.A.C. Duo Fibre Blush Brush, $35) because, according to Stapleton, the combination of natural and synthetic fibers apply and blend foundation into your skin seamlessly.

Step 2: Use M.A.C. Prep + Prime Highlighter, $26 (he used Radiant Rose on me), a color-correcting under eye brightener, to conceal any dark circles. Also use it to highlight the bridge of your nose, under your brows and around your lips. Blend it into your skin.

Step 3: Take a fan brush and lightly apply M.A.C Prep + Primer CC Colour Correcting Compact, $26, in Illuminate, a lilac color-correcting powder, under your eyes and on the tops of your cheekbones.

To add even more dimension to your face, Stapleton recommends subtly contouring your face and filling in your brows.

Step 4: Use a taupe contour powder to lightly add more dimension to your cheekbones. Keep the color concentrated under your cheekbones, toward your hairline, which will make the added definition look more natural, says Stapleton.

Step 5: Bold eye makeup calls for groomed brows. Stapleton used M.A.C. Eye Brows, $16.50, to color in and define brows, and then set them with Brow Set, $17, a clear brow gel.

Step 6: Use an eye shadow shade a couple of shades darker than your skin tone over your eyelid. For me, Stapleton chose M.A.C. Eye Shadow, $16, in Soft Brown.

Create an outline of the dramatic cat eye Catastrophe wears. To do this, use a firm eye shadow brush like M.A.C. 252 Large Shader Brush, $32, to apply your shadow. Start from the inner corner of your eye and extend it outward. When you reach the outer corner of your crease, extend out into a thick cat eye shape (it should reach past your brows). Then smudge the eye shadow underneath your lower lash line, from the inner corner until it connects with the upper cat eye line.

This gives you a "stencil" to work with when you actually do add in the black. It gives the color something to stick to, and is much easier to fix if you make a mistake. It also allows you to get the cat eye perfectly even on each side.

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.