Gwen Stefani wore a red bikini under her white skirt and tank top yesterday at the beach. She took her two sons, Kingston and Zuma, to Newport Beach for an afternoon on the sand. Both Zuma and Kingston played with shovels and ventured into the water, though Gwen was content to keep an eye on them from under the safety of her umbrella. Gwen's on the West Coast with her little ones after a mini promo tour with No Doubt to show off their new music. The band's counting the weeks until their comeback album, Push and Shove, arrives in stores on Sept. 25.