Gwen Stefani with Kids at a London Park - Oct 2

Gwen Stefani enjoys the unusual hot British weather with a day at the park with her son Zuma and his nanny. The 42-year-old singer popped open a £40 pound bottle of Laurent-Perrier Ros NV champagne while Zuma and his nanny practiced their boxing moves. Zuma appeared to have taken his 'Start Wars' vest top literally and accidentally hit Gwen in the face, but when he saw his mother play cry he ran over and kissed it better.

(Photo by Bauer Griffin)