Eau Thermale Avène Hydrance Aqua Gel 3-1 Moisturizer
Makeup artist Daniel Martin, who works with Jessica Alba, Elisabeth Moss, and Meghan Markle (he did her wedding-day makeup), is obsessed with the Eau Thermale Avène Hydrance Aqua Gel 3-1 Moisturizer (£15) as a makeup prep. "I love this stuff!" Martin said. "It locks down foundation in such a way that it doesn't feel heavy on the skin and the gel cream texture doesn't feel sticky, either."