Gwen Stefani's kids had "the best time" on her tour

Speaking on The Ellen DeGeneres Show, she said: "They had the best time. Can you imagine three little boys on a [tour] bus after you do a show like, 'Get to bed!' ... It's exhausting. But it was fun.

"Zuma was so into it ... I have a quick change where I was changing costumes and stuff - he was working it. He had his flashlight, headphones; he walked me on and off the stage every single night. For two hours he worked back there - he was so into it."

Meanwhile, the 46-year-old singer - who also has Kingston, 10, and Apollo, two, with her ex-husband Gavin Rossdale - previously opened up about her split from the 48-year-old musician, admitting she went through "months and months of torture".

She said: "Nobody except for my parents, the people involved, and whoever they told [know specifics].

"Nobody would believe it if I could really say what happened. I went through months and months of torture."

Asked if she knew something was going on, she added: "All you have to do is listen to every single song I've ever written and it's all there. It's an ongoing theme that I've had for a long time."

Gwen is incredibly happy with Blake Shelton now but she admits they both had "trust issues" at first.

She said: "We were both having trust issues, as you would if you were us. It was like, 'I have so many problems. How can I now be getting into another potentially huge problem? What am I doing?'"