Holm likes to prep her client's skin with the Kiehl's Ultra Facial Moisturiser ($30). "I use a light layer of [the Ultra Facial Moisturiser] because it makes the face nice and moisturised, and it doesn't make skin feel greasy throughout the day," she said. "I don't need a lot of this product. I start with a pea size, warm it up with my hands, and apply it lightly onto the skin."