Brazilian beauty Isabeli Fontana was the last model that Fab and I talked with at the Victoria's Secret Fashion Show. The 24-year-old, who started modeling for Victoria's Secret when she was just 16, has appeared on the covers of Vogue, Elle, Marie Claire and other fashion heavyweights. We had only a few minutes—literally—to chat, but she shared some good details about her skincare routine and philosophy.

Any beauty tips or secrets you've learned through modeling?
I've learned that you cannot sleep with makeup on because your skin gets oily at night. So it's best to clean your face and moisturize well. Even if it's oily, it's good to moisturize. So put a good product on your face; your face has to be fed with a good moisturizer cream.

To find out why Isabeli won't wash her face with tap water, read more

What brand of skincare do you use?
I love Shiseido and I love Biotherm. And the most important thing is to wash your face with Evian water. Because the water we always use from the shower is dirty, it has pollution in it. But the natural ones you spray on your face don't. Just leave it on your face until it dries. It's better because there's no pollution or dirty stuff; your face needs to be fresh after you're walking around the street. The pollution is really bad. It makes your skin wrinkly faster.

When you're not working, what would your face look like on a normal day?
A normal day? Nothing. I never wear makeup, actually. Only when I go to parties and I want to feel pretty for my boyfriend. But nothing special.

Do you wear sunblock?
Every day. I think it's very important because you don't want to have marks on your face, you know. You want to have a fresh face, a baby's-butt face.

Have you always felt beautiful? Do you always feel beautiful now that you're a model or has it been a struggle?
I have to try to feel beautiful because I never feel beautiful in my life, you know what I mean? Because I have other things to worry about. I have two babies. I'm so busy. I never feel pretty.

It's so funny—no, never. The only time I enjoy myself is on the runway when they're doing this major work—the makeup, the hair. That makes me feel prettier.

That's fascinating. You know, millions of women look at you and think, "I wish I could look like her."

Oh. Well, I don't think that's the most important thing ever. The most important thing is how you are inside. And if you're happy inside, you glow and look prettier. I never feel like, "Oh, I'm so pretty!" I never felt like that. Oh my god, I always thought I was horrible, the skinniest thing ever. I hated myself when I was young. It's crazy.

You need to stop thinking like that.
I know, I know! I'm trying to work on it.