Mark your calendars: On November 22, Urban Decay's limited edition UD | Gwen Stefani Eye Shadow Palette officially hits stores. It has 15 gorgeous shades, 13 of which are brand new while three are existing Urban Decay colors. "I choose them because they're the colors I wear," says Stefani. "I can't really get away with [crazy colors]. I can if I have a makeup artist, and a photographer and lighting. But not in real life; I want to make stuff for real life. I want to be able to take that on the plane, and that's it." She adds that she'll also pack foundation, lashes and lipstick (she's serious about her makeup), but the palette has all the eye shadow she needs.

Gwen Stefani is an Orange County, California, native, and the O.C. also happens to be the home of Urban Decay. Both Stefani and UD founder Wende Zomnir felt this collaboration was meant to be. "When I started designing, the idea of doing my own [makeup] line was obvious," says Stefani. "But it never happened. It was never the right time, and now I understand it's because I was always supposed to do it with [Urban Decay]. These girls are so awesome; the brand is so awesome. They're from Orange County -- they do their own thing. They did it their way. They're really similar to me in their aesthetic. It was really cool when it came along and how it was going to happen. Designing the palette, the colors, and also the artwork and everything that goes along with it. They're really good at what they do, and they made it really easy."

Stefani's go-to eye look is surprisingly neutral. She layers beige over champagne over taupe and finishes it off with lots of lashes. However, she also included a few bold colors in her palette. ("I wanted to create the crazy colors," she says.) To wear the pink (Harajuku) and navy (Danger), here's what Stefani recommends: "The pink is something I would wear with just lashes and a clean look with all pink. And [navy] I use for a blended line."

Gwen Stefani is known for her signature red lip, and she and Zomnir hinted that a red lipstick might be coming next spring. When I ask Stefani about her plans for future makeup launches, she is enthusiastic -- if a little vague. "I want to do everything -- just keep it coming," she says. "But I don't want to do things that I don't wear."

Unless she's putting together a look for "The Voice," Stefani doesn't necessarily think about pairing her beauty look with her outfit. "In my everyday life, it's more about looking in the mirror and figuring out what has to happen here," she says. "Let's try to fix this. You know what I mean? And what's my mood and where am I going. I pretty much wear inappropriate makeup in the daylight all the time."