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Gwen Stefani was in the celebratory spirit over the weekend as she took her boys Kingston and Zuma to a birthday party in Los Angeles.

The No Doubt frontwoman and her family showed up to pal Gwyneth Paltrow's pad for her son Moses' party where they were joined by other A-list parents like Tobey Maguire, Nicole Richie and husband Joel Madden to name a few.

Sounds like they had a blast!