Gwen Stefani says it's a "nightmare" being a working mother.

The singer-turned-fashion designer has two sons - Kingston, five and three-year-old Zuma with her husband Gavin Rossdale.

Gwen is currently preparing for her music comeback with ska band No Doubt, and says she's finding it difficult to juggle her home and work life.

"I've never been able to balance being a mom and my singing career it's a nightmare!" she exclaimed to British magazine Closer.

However, the 42-year-old star insists her family are always her top priority.

"I love my boys, so if there's a decision to make, they come first," she added.

Gwen is currently recording a new album with her famed band No Doubt. Their last LP Rock Steady was out in 2001, and the star wants the band's latest work to be appealing.

"We have already got ten songs and want to do a bit more. Our last album came out 11 years ago, we've changed. That's important to our musical process but at the same time it's a lot of hard work if you want to come together again," she recently explained.