Gwen Stefani's son is looking likeBlake Shelton's twin! The"Hollaback Girl"hitmaker posted an Instagram tribute for her middle son Zuma's 17th birthday Thursday, Aug. 20, and one sweet snap features the star's son with his famous stepdad. Stefanicaptioned the post, "happy birthday to our sweet and talented Zuma!! we love u soooo much!! ❤️" Zuma – who seemingly wants to be a country crooner like Shelton – sported matching western shirts and cowboy hats in the picture, rocking the same type of mullet as the"New Country"collaborator at the start of his career. View this post on Instagram A post shared by Gwen Stefani (@gwenstefani) Gwen Stefani tears up as Blake Sheltonspeaks at Walk of Fame ceremony: See photos Stefani also shared a video of Zuma (who she shares with British rocker exGavin Rossdale) singing a cover ofZach Bryan's 2024song "Dawns"featuringMaggie Rogers. Last year, Stefaniopened up about her childrenfinding their own musical tastes. "I look at my kids and see them discovering music and I'm like, 'How did you find '80s music?' Of course they would have heard it in the house or the car, but the 'you might also like' (algorithm) is out there a lot," Stefani said. In 2023, the star stunned withher three sonsand husbandSheltonduring herHollywood Walk of Fame ceremony. As they celebrated the Grammy-winningNo Doubtsinger and"The Voice" coach, Shelton praised Stefani for her approach to balancing life and work. "It was clear to me that she was a mother, first and foremost, over anything else in the world," Shelton said of first meeting her in 2014. "And now standing here, almost 10 years later after I first met her, I can say without question that being a mother is still the most important thing in her life." Stefani also has sonsApollo, 11, andKingston, 19. Contributing: KiMi Robinson This article originally appeared on USA TODAY:Gwen Stefani's son twins with stepdad Blake Shelton