Halsey's About-Face makeup is now sold at Ulta Beauty — what to buy - Insider

The top product I'd recommend is the Matte Fluid Eye Paint.

A blue About-Face eye paint (left) and me wearing the red shade of the product (right).

Amanda Krause/Insider

The $16 Matte Fluid Eye Paints are liquid pigments that can be used as eye shadows or liners. I own the product in multiple shades, and each one is vibrant, long-lasting, and opaque. I sometimes even mix them to create more colors. 

It has a doe-foot applicator that's perfect for creating all-over shadow looks, but you'll need a separate, small brush to create sharp lines. Still, I think it's worth every penny.