EXCLUSIVE: Gwen Stefani Is Helping Adam Levine and Behati Prinsloo Pick Out Baby Names

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Gwen Stefani is lending her parenting expertise to a close pal.

ET's Katie Krause caught up with the 46-year-old "Misery" singer at 102.7's KIIS FM's Wango Tango concert in Carson, California, on Saturday, where she couldn't stop gushing about one of her fellow Voice coaches (and no, we're not talking about Blake Shelton).

WATCH: Adam Levine Jokes He's 'Pregnant Too' In Cute Pic With Wife Behati Prinsloo

Stefani and Adam Levine have remained close since working together on the singing competition show. So close, in fact, that the Maroon 5 frontman, 37, has been keeping her in the loop on wife Behati Prinsloo's pregnancy. Levine and the 26-year-old model are currently brainstorming baby names for their first child together, and Stefani says she's already received a slew of texts with potential monikers from the cute couple.

"I'm not a very good advice giver," Stefani admitted, adding, "but I have definitely been watching [Behati's] belly grow and I'm so happy for them. I'm so excited."

"Adam keeps texting me, 'What about this name? What about this name?'" the rocker continued. "And then just all that kind of stuff. It's just really fun. It's fun because I've had so many kids. I'll be like, 'And then this happens. And then this happens. And then wait, this is what's going to happen.' It's fun."

Stefani, who has three kids of her own -- Kingston, 9, Zuma, 7, and Apollo, 2 -- with ex-husband Gavin Rossdale, kept hush when ET pressed for names, however.

"Are you kidding me? Like I would tell you," she joked, adding, "No way!" when we encouraged her to spill the tea.

PHOTOS: Gwen Stefani & Blake Shelton Take a Selfie With Adam Levine & Behati Prinsloo

Looks like we're just going to have to wait until Levine and Prinsloo make an official announcement.

The No Doubt frontwoman also chatted with ET about what it's like making beautiful music with her boyfriend, Blake Shelton. Watch the video below to hear Stefani gush on the adorable duo's first-ever duet, "Go Ahead and Break My Heart," a track off the country singer's newest album, If I'm Honest.