The Bush frontman, who has Kingston, 10, Zuma, eight, and Apollo, three, with his ex-wife Stefani, believes "you've got to be crazy to have a career in music," reported Female First.
"I would say go into tech, do something like that. I have so many children, it is my responsibility to make them contribute to society as oppose to take away from society. So whatever they do is fine by me, they've just got to be positive, cool people, that's all I care about," Rossdale says.
"I was with her for 20 years, so much in the same way I think for her material, I'm all over that material. And for me, she's all over mine. It's impossible to separate that," Rossdale says.