The Stefani-Rossdales Party With The Beckhams

Rockers Gwen Stefani and Gavin Rossdale arrived with their two sons - Kingston, 3 1/2, and Zuma, 17 months - at Xtreme Martial Arts World Headquarters in North Hollywood to celebrate Cruz Beckham's 5th birthday on Saturday (February 20).

While Gavin was all smiles for the paparazzi, Kingston looked a bit shy. Little Zuma didn't seem to mind the shutterbugs and gave a quick grin as mom got him out of the car seat.

We just spotted Gwen and her adorable boys swinging at the park last week.