"As a model, sometimes you get into a shoot and you're not told what you're wearing," the brunette beauty continues. "A stylist just brings out everything and you don't have much of a choice. So I just let them know if I get booked for a job, I'm not wearing leather and I'm not supporting fur. I bring my own shoes, and if there's anything specific that they need I can bring it."

Nicole admits she has worn leather in the past but stopped when she learned about the terrible treatment of animals in slaughter houses around the world.

"Like most people, you don't think about where this leather is coming from. I mean you know it's animal skin, but you don't think about what has that animal gone through for you to wear this jacket," she says. "Animals have feelings just like us, and if you're an animal lover you'll realize that."

Watch a brand-new WAGS this Sunday at 10 p.m. to see more behind-the-scenes footage from Nicole's new PETA ad!