Gavin Rossdale on Advising Team Gwen on 'The Voice' : 'It Was Amazing Fun'

The Bush frontman tells PEOPLE about the experience, his new album and how the (three!) boys are doing

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Updated on December 2, 2020 12:47AM EST

Gavin Rossdale and his wife, Gwen Stefani, don’t get a lot of downtime.

“That’s why I called my new Bush album Man on the Run,” he tells PEOPLE of his band’s newest release, out now. “It’s such an incredible pace we all live at, and we’re all sort of scattered and challenged. There’s not enough hours in the day, or days in the week. I have my first afternoon off in three weeks later today, and I’m giddy with excitement! I don’t actually know what to do with the time.”

Even so, when the rock star’s wife, 44, asked if he wanted to join her on The Voice as a mentor for her team this season, he was immediately game to add it into his already packed schedule.

Fortunately, he says, it worked out wonderfully.

“It was amazing fun. I really enjoyed it,” Rossdale, 48, says. “Normally, we’re by ourselves in these crazy, adrenalized situations, like being on TV or performing in front of the camera. So, I’m used to calling her afterward and telling her all about it, saying either ‘That was so fun,’ or ‘so weird,’ or ‘I’m paranoid I was bad.’ But with this, I could just walk into her dressing room and talk to her.”

So, the two didn’t share a dressing room?

“We did not,” he says. “That’s a bit unromantic. But she has a really big team!”

He says they also got along great on set, and didn’t really argue at all.

“I just did my best not to interrupt her too much,” he says.

The couple, who have been married for 12 years (and dating since the late ’90s) have three sons together: Kingston, 8, Zuma, 6, and Apollo, 9 months.

Rossdale says that despite their DNA, the older boys have yet to show an interest in music themselves.

“We weren’t those people who were like, ‘We’ve been playing Mozart to the womb since the day we found out!’ ” the musician says. “But we’re about to start forcing the piano – I hope. Right now, I just want them to stop playing on the iPad!”