Turns out Kim swears by this chemist favourite: Sally Hansen's Airbrush Legs Lotion. The $18.99 lotion is fast-acting and can be used from head to toe to cover freckles, veins and other imperfections, along with the illusion of a perfect tan.
Kim actually used the product for one of her most recent outings, the Balmain store opening in Los Angeles.
In her Instagram Story, her makeup artist Rob Scheppy could be seen drying the lotion with a Dyson hair dryer to avoid staining her pristine white crop top.
"Olivier we are on our way—we had a fashion emergency," she said. "Got makeup everywhere!"
We're pretty impressed! Shop the product here.