Gwen Stefani says she feels "guilty" for being a working mother.
The No Doubt singer - who has sons Kingston and Zuma with Gavin Rossdale - feels bad about leaving her children while she is touring and she admits she had concerns about rejoining the band after an 11-year-break.
She said: "[I was] getting to the studio and [worrying about] not being able to make it happen and missing out on being at home, missing out on putting the kids to bed. What's more important? I felt so guilty.
"[I thought] I am letting everyone down in the studio right now, I'm letting down my kids; I'm letting down myself. Because time is so precious."
The 43-year-old star - who has been busy touring and recording the group's new album Push and Shove - said she has found it tough being a parent and admits it has forced her to grow up.
She told US Vogue: "It's super fun being a mum but it's not what you think it's going to be. And it's really gradual.
"At first, your life is totally the same. You have this cute little thing that you get to drive around everywhere and it's amazing. As they grow it really does start to change your life. Like, 'Oh, my God, they have school, they have to get through first grade, they have to learn to read.
"When you have a family of your own it forces you to go into the adult world a little bit more," she said.