Gwen Stefani kept warm in a striped scarf and snow pants for an afternoon in the snow with Kingston and Zuma today in Mammoth Lakes, CA. The boys both wore colorful hats to join their mom for fun on their sleds. Her snow-filled outing comes at an appropriate time. Earlier this month, Gwen announced that her fashion label L.A.M.B is collaborating with Burton Snowboards to create a stylish cold climate collection. The range of gear will be sold at Burton's flagship stores in September. Gwen's focus shifted to fashion after she dedicated much of last year to her music career with the September release of her sixth album with No Doubt.