LOs Angeles (SS) SINGER Gwen Stefani admits she finds it stressful having a busy career and personal life . The No Doubt star, 43, puts pressure on herself because she is always trying to juggle her responsibilities as a mother to sons, Kingston, six, and Zuma, four, with her work with her clothing line L.A.M.B. and her commitments with No Doubt. “Well, you don’t plan for it to all happen at one time,” she said.