Celebrity makeup artists have a lot of power. Not only do they dictate how a star’s biggest flashbulb moments will be remembered throughout history—bold lip or smoky eye?—but they also have a major say in what ends up in their clients’ personal medicine cabinets.

It’s a duty Katey Denno takes lots of pleasure in fulfilling. A natural makeup artist and green living expert, Denno paints the faces of badass ladies such as Felicity Jones, Amanda Seyfried, Mindy Kaling, and Connie Britton—and she’s super serious about spreading the all-natural love as she does so.

“It’s so funny, it’s not that common that my clients are into green beauty,” says Denno. “[They’re] few and far between, and it makes me super thrilled. I always try to make a big deal out of amazing products—I’m like, ‘Let’s get excited about this lip balm!'”

So what’s the product that Denno uses to convert her clients to the clean beauty cause?

“One thing that everybody unanimously loves is May Lindstrom’s The Jasmine Garden,” reveals Denno, who also has a personal affinity for Biossance’s squalane oil. “This face mist is one of the only products that clients have always been enamored with across the board. I can’t tell you how many times I’ve contacted Lindstrom saying ‘This celeb is obsessed, would you mind sending her one as a gift?'” (Ah, the perks of having a robust IMDB profile.)

It’s easy to see why they’re obsessed—this is the kind of product that can be used to freshen up any look. Each spritz is filled with antioxidants and anti-inflammatory botanicals, leaving complexions dewy and hydrated without any harsh chemicals.

No wonder it’s got a flawless track record. “I spray it in everyone’s face and keep wondering if anyone’s not going to like it,” says Denno. “It never happens.”

If you’re looking to make the clean beauty switch, these are the 3 most important skin-care swaps to make first. Then, continue your medicine cabinet clean-out with the 3 essential makeup products to replace.