Gwen Stefani & Her Boys Park It!

Look at that sweet tummy!

Rockstars Gwen Stefani and Gavin Rossdale headed to the park for some playtime with their two sons - Kingston, 4, and Zuma, 2 - in New York City on Saturday (September 18).

Gwen had fun with Zuma on the slide while Gavin pushed the boys on a spinning tire. The famous family then headed back on Madison Avenue with a nanny taking care of Zuma along the way.

After successfully showcasing her latest L.A.M.B. creations at New York Fashion Week on Thursday (September 16), Gwen and the boys of No Doubt are ready to focus on the music. The band tweeted: "Thanks to all the fans for their love during fashion week. Gwen and the guys are heading home & to the studio."