Inside Gwen & Gavin's Birthday Bash for Baby Zuma

Happy birthday, Zuma Nesta Rock Rossdale!

Gwen Stefani and Gavin Rossdale celebrated their youngest son's first birthday this afternoon with an outdoor soirée.

"I got home from the studio and was cooking burgers at 3 a.m. this morning to prepare for the party," Gavin tells us. "I'm the chef, and Gwen's more of the party planner. She takes care of the presents and the guests. I just love to cook for everyone."

So what do you give an A-list rock star spawn who probably already has everything? Read on to find out...

"There will probably be a lot of little trucks as presents," Gavin says. "And squeaky shoes. Zuma likes squeaky shoes. We just took him to get a pair the other day. He likes when they go 'squeak, squeak, squeak.'"

Three-year-old big brother Kingston wasn't left out of the gift-giving. "He'll probably give Zuma a dinosaur or something he can play with, too," Gavin says.

Papa Rossdale says his whole brood will most likely be in tow next Wednesday when he performs at L.A.'s The Grove mall in support of his latest hit album, WANDERlust. "I love the attention," he admits. "All musicians love the attention. That's why we do it."

And it sounds like the apple doesn't fall far from the tree. Gavin says, "I know Kingston wants to join me on stage."

Today 3:59 PM PDT by Marc Malkin
—Reporting by Dahvi Shira
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