Jennifer Lopez may be 45, but the actress-singer continues to impress with her age-defying looks. Model Maria Fernanda Cornejo, 25, is one person who was stunned by Lopez in person.

Cornerjo participated in the the Wisin music video for "Adrenalina," a song which features Ricky Martin and Lopez and ended up seeing Lopez without makeup.

"She seems to me like a very precious woman," Cornejo told "Ecuavisa," according to La Opinion. "I saw her without makeup in the dress rehearsal and I said: 'Whoa, what beautiful skin. She must use her creams and all that stuff.' It made me want to ask her: 'What do you put on your skin?' I swear, but I didn't ask. And working with her went super well, she is super friendly."

In July 2014, Byrdie spoke to Lopez's makeup artist, Mary Phillips, to learn about Lopez's skin routine. Lopez uses L'Oreal's Age Perfect Glow Renewal Day Lotion, which Phillips said is great because it's the company's "first oil-infused lotion and it has SPF."

"I'd say skin prep is the most important part of your makeup routine," Phillips said. "People should start thinking of their skin care as their makeup. If your skin isn't in its prime condition, it hinders what I'm able to accomplish [as a makeup artist]."

Lopez also uses L'Oreal's RevitaLift Moisture Blur as a primer.

"It diffuses light and creates a very even appearance, while giving a silky finish to the skin," Phillips said.

Recently, Lopez announced her newest fragrance, JLuxe. She has previously released Glow and JLove.

Watch the "Adrenalina" video below.