Gwen Stefani is worried about taking her two sons on tour with No Doubt. The singer - who raises nine-month-old Zuma and Kingston, three, with her husband Gavin Rossdale - is concerned about how her bandmates will cope with her growing entourage.

She said: "Before, when I was with the guys, I didn't have any kids. That's like, whoa, a huge deal. They dynamic of the band is different. It has to be."