Gwen Stefani is bringing out a big-time battle advisor for her return to “The Voice”!

Black Eyed Peas’ front man is joining the No Doubt singer for Season 17.

“Extra’s” Terri Seymour caught up with the duo, who dished on working together. Gwen said she had a warning for her contestants: “When they walk in, I’m like, ‘Get ready to have your minds blown, because he has so much good advice!’”

Fans of “The Voice” won’t want to miss the September 23 premiere on NBC as Gwen, Blake Shelton, John Legend and Kelly Clarkson kick off the blind auditions.


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