Tomlinson's current favourite foundation is Nars Radiant Longwear Foundation (£35) 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 (£15) 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 Insta Glow (£12) 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 (£28) and Benefit Cosmetics Caramel Bronzer (£26) 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.