Tomlinson's current favorite foundation is Nars Radiant Longwear Foundation ($49) for a few reasons. It gives really nice coverage, it's long-wearing, and it works well with self-tan drops. If you're thinking "self-tan drops in foundation?," well, same. At first, the idea seemed odd, but turns out the trick is pretty genius. "Every few days, I just put a few of the Tanologist Self Tan Drops ($20) in my foundation, and it keeps my faced topped up [with tan]." She did warn me to be extra careful that the foundation is completely blended to avoid any patchy tan developing.
Tomlinson also uses that same Insta Glow product on her face as a contour, explaining that it sets matte and gives another layer of bronze to the skin. She follows this with Tarte Shape Tape Concealer ($27) and Benefit Cosmetics Caramel Bronzer ($30) for the ultimate glowing and bronzed base.
As for her brows, forget about using soap to perfect them; Tomlinson uses hair wax to set her eyebrows in place and says it works even better than soap.