Even though she's taken big risks and worn some out-there looks over the years, Stefani says she has no regrets in the fashion or beauty departments. "Why regret life?" she asks.

"The only regrets I would have would be working with a makeup artist and I didn't like it, and I just let it go and didn't speak up," she says. "I learned over the years that there are not a lot of people I trust to do my makeup, but when you find someone that is incredible, it's just the greatest thing in the world." (Stefani has been working with makeup artist Gregory Arlt [shown here] for years.)

"Other than that, it's life, and you understand why you did it. And why regret it because you lived it?"

I ask Stefani if anything still makes her nervous even though she's been performing for more than 20 years. And she says "of course" but that she's embracing a more spiritual "live in the moment" life philosophy right now.

"Even before I go on stage, life is so crazy and chaotic and emotional, and I've been doing a lot of shows with No Doubt and sometimes I don't even know where we're going to be," she says. "Like where are we going? I don't even know what the stage looks like until I see it. So I just say a little prayer and whatever happens … I love that. It's so much funner to be spontaneous and in the moment and not to try to plan it out."