The 42-year-old star has to juggle her music career, her work with her fashion lines L.A.M.B. and Harajuku Lovers and her responsibilities as a mother to her sons, five-year-old Kingston and three-year-old Zuma, and occasions she takes a break in her wardrobe.
She said: "Meditation is my thing. But I`m not going to lie: sometimes I go into my closet and lock the door so no one can find me."
Gwen - who is married to Bush rocker Gavin Rossdale - didn`t think she would still have a music career when she was over 40 and she says it is more practical to be a fashion designer and a mother, than a pop star and a parent.
In an interview with InStyle magazine, she explained: "I started my first line L.A.M.B. in 2003, because I didn`t think I`d still be doing music when I was 40, but I knew I`d be depressed if I wasn`t doing something creative. Plus, I love having a job where I can be in my office and look out the window and see my kids playing - I can`t imagine a day off really. I didn`t know that all of this would happen at one time - that I`d be a wife and mom, still making records, having clothing lines - and pulling my hair out."