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Gwen Stefani ran errands with sons Kingston and Zuma in Los Angeles on Wednesday, and despite the fact that temps hit the low 90s in most parts of the city, the No Doubt front woman didn't even break a sweat! How does she do it?!

Gwen was joined by one of her two nannies and we're guessing she can't WAIT for hubby Gavin Rossdale to get back home to California in ten days. Gavin is currently touring Europe with Bush, and though he'll be back on the road in late September and early October, he'll be spending a good solid two weeks with Gwen and the boys when he gets home on September 9.