To keep the effect natural, it's best to start out with a moisturizer mixed with a medium-coverage foundation to even out your skin tone. One of the best skin perfectors is Philosophy The Supernatural Superbeautiful Super Healthy Hybrid Makeup SPF 20.
The goal is to create a flawless canvas with a radiant finish, which Keira Knightley shows off here. Mix it with your favorite moisturizer in equal parts on the back of your hand (your body heat will help it blend), then apply it with a foundation brush for gorgeous, air-brushed skin.
Photo Credit: WENN.com