Fisher used this eyeliner from ColourPop to create Duff's look. It's a highly-pigmented, cream-gel hybrid that glides on easily without tugging or pulling. Even though it's easy to blend after application, it dries down and becomes long-lasting, transfer-proof, and waterproof. In other words, it won't budge, even after sweating and swimming.
The eyeliner comes in 25 shades, but since this one is so eye-catching, we're guessing it will sell out first. That's why we're adding it to our carts with a few other drugstore makeup products that are a good fit for summer.