"The most important thing," says Washington, "is drinking a lot of water. I live on both coasts [in L.A. and Manhattan], so staying hydrated is big for me." Monthly facials help stave off the occasional breakout, as do Mario Badescu skin-care products and facials. "I'm not married to any particular line," she says, "but this was the first one I used regularly, so it's my touchstone brand. When I need the tried and true, I come back to it."
•Mario Badescu Skin Care Alpha Grapefruit Cleansing Lotion, 8 oz., $15; mariobadescu.com
"I use tons of sunscreen and moisturizer," says Hu, adding that she regularly uses Issey Miyake Moisturizing Body Lotion. A favorite cosmetic? Kiss Me Mascara.
•Kiss Me Mascara, $25: blincinc.com
"I don't drink a lot, and I'm I not out in the noonday sun. Yoga is really helpful. The only product I use regularly is Elizabeth Arden Eight Hour Cream. I have a tube in my car, a tube in my purse, a tube in my bathroom."
•Elizabeth Arden Eight Hour Cream Skin Protectant, 1.7 oz., $15; drugstore.com
"I use a three-part regimen called Natural Advantage, and it's under $20. Makeup people keep trying to buy me these $150 creams, but I've liked Natural Advantage so much, my name is going to be attached to it."
•Natural Advantage All Day Moisture With SPF 15, 2 oz., $19.95; naturaladvantage.com