Gwen Stefani tells iHeartRadio that her son says it's only OK to leave home to play charities. "I was telling my son before I left, because I was trying to make an excuse why I was leaving. I was like 'by the way, it's a charity, it's gonna be amazing, it really helps kids.' He was like 'OK, you can go do that. That's OK.' Like I was allowed to come because of that. And I think everybody, even from young to old, everybody wants to make a difference and help."
Find out what else the band had to say about social media, what it was like to perform with Sting, and watch them do a short a cappella version of "Hella Good" below!