Gwen Stefani admitted it was 'awkward' to work with husband Gavin Rossdale on 'The Voice'

Singer Gwen Stefani (R) and her husband musician Gavin Rossdale. (Reuters)

Gwen Stefani says she was nervous about working with one person in particular when she started on "The Voice" as a panelist: her husband.

Gavin Rossdale was the "coach" brought in to give advice to members of Stefani's team of aspiring singers on the NBC music competition show, which starts its new season on Sept. 22. Rossdale was the lead singer of the British rock band Bush.

"It was just awkward," she said. "We've only collaborated on making babies."

There are three of those, the latest born this spring. Stefani, a solo artist and lead singer of the band No Doubt, said that not only had she and Rossdale never worked together on a music project, they weren't even fans of each other's music before getting to know each other.

Stefani, 44, said she worried what would happen if they fought about what advice to give a particular contestant. But she said it didn't happen.

"It was just so fun," she said. "It was right at the beginning of the show and I was just getting my feet wet, so having him there was kind of rad."