On why she's careful about being such an open book: "It's because I have children [Kingston, 10, Zuma, 7, and Apollo, 2]. As a famous person, you start to think, 'I can't say all that because I'll embarrass them or hurt them in some way.' And especially now because they can see everything and hear everything. But I've done nothing I'm ashamed of . . . [breaks into laughter] Well, we all have a few things we're ashamed of."
On forming No Doubt and writing "Don't Speak": "We never meant to make it. Like, we just wanted to play shows, you know? And then I fall in love with this 16-year-old guy, Tony [Kanal], who ends up being our bass player, and we do everything together . . . and then he breaks up with me. I was like, 'What am I doing? This is like, seven years of my life.' Then the next chapter: I meet Gavin, right? And that was it. [My personal life] was my boyfriend and then my husband."