No Doubt has stepped back into the spotlight now that it is going to be releasing its first album in 16 years -- but even after all that time Gwen Stefani and No Doubt bandmate Tony Kanal still have trouble talking about their breakup, the Daily Mail reported.

No Doubt shot to stardom after “Don’t Speak” -- a track on its hit album “Tragic Kingdom" -- was released. The song was Stefani’s reaction to Kanal's breaking up their seven-year relationship.

Kanal told the Guardian it was “brutal” to play on stage while his ex-girlfriend sung about how much he had hurt her: “Oh. definitely. We were on tour for 'Tragic Kingdom' for 28 months. We were going through the breakup, and in every interview we were talking about it, so we were opening this wound on an hourly basis. It was so brutal but I don't know how we made it through.”

However, both musicians, now 42, have moved on since their 1990s breakup -- and Stefani revealed that it made her a better songwriter.

“Before, I was really passive, all I cared about was being in love with my boyfriend," Stefani said. "I didn't have any creative power, nothing. But after the breakup, I just started writing all these songs, and suddenly I was: ‘Oh I think I'm really good at this!’”

Stefani is currently married to Bush frontman Gavin Rossdale. They have two sons: Kingston, 6, and Zima, 4.

Alhough Rossdale also is in a rock band, he isn’t a fan of No Doubt’s work.

“Oh, he's never been a fan of what we do. He's more into dark, indie stuff,” Stefani said during an interview. “But I'm not saying he doesn't think I'm amazing.”

No Doubt is gearing up to release its first album since 2001, “Push and Shove.”