Zooey Deschanel's Must Haves: From a Leather Backpack to a Smart Coffee Mug

As someone with sensitive skin, Deschanel follows a very particular skin-care regimen — which includes this Mother Science Molecular Hero Serum ($89). "You can fit it into any skin-care routine, but it's great for fine lines and fading hyperpigmentation. It doesn't irritate my skin at all. And it works just like a vitamin C," she says.

Pro Tip: For best results, apply one to two pumps of the solution to your face after cleansing and prior to moisturizing. Per the brand, this product can be used in place of a vitamin C serum or layered with other solutions.