The Voice Gwen Stefani celebrates son Zuma's birthday at 'Harry Potter' party 08/15/2017 Gwen Stefani celebrated her son Zuma's birthday at an elaborate "Harry Potter"-themed party over the weekend. Read More RELATED NEWS Gwen Stefani confirms Las Vegas residency: "It's happening!"Gwen Stefani and her kids spend spring break in OklahomaGwen Stefani attends Jennifer Lopez's show in Las Vegas TAGS: Blake Shelton Gwen Stefani Gavin Rossdale
