Gwen Stefani's youngest son and "biggest fan" Apollo shared a sweet moment with his mom backstage during No Doubt's unforgettable weekend two reunion set at Coachella on Saturday (April 20).

According to Entertainment Tonight, the 10-year-old (whom the standout shares with ex husband Gavin Rossdale of Bush) joined Stefani and the band on stage before the show to give the pretend soundcheck crowd a "shout out" as the musicians played "Bathwater."

He took the microphone to welcome Coachella-goers and eventually returned it to Stefani with a big smile on his face. No Doubt went on to perform some of their biggest hits including "Different People," "Just A Girl," and "Hey Baby," among other show-stopping singles. Last weekend was the iconic groups first time performing together in 9 years!

After the unmatched set concluded, Apollo met his mom backstage for a big hug, caping a legendary end to a legendary weekend full of music and love. The songstresses' son was not the only one waiting for her backstage after the set. Husband Blake Shelton also showed up to support his fabulous wife and the rest of No Doubt amid weekend two of the festival after missing last week's set to officiate a wedding in Nashville. Despite being absent for the initial reunion performance, Shelton did make time to watch it online, telling ET that it was one of the best concerts he'd ever seen!

"I told her that was the greatest concert I've ever seen. The amount of people there, how engaged they were. I've just never seen anything like it. And I've never seen Gwen perform like that. It's just a different kind of energy."