Celebrity Gwen Stefani Steps Out Smiling Amid Claims Gavin Rossdale Cheated with Their Nanny Gwen Stefani ain't no Hollaback Girl By Karen Mizoguchi Published on November 12, 2015 11:15 PM Share Tweet Pin Email Photo: Chiva/INFphoto.com Gwen Stefani was all smiles when she was spotted in Los Angeles on Thursday, following reports that her ex Gavin Rossdale had an affair with their nanny. The 46-year-old singer – who is currently dating Voice co-star Blake Shelton – appeared to be in good spirits, showing her beaming smile. Stefani was a standout in a bright neon pink sweater, dark denim jeans, mirrored sunglasses and black booties. The No Doubt band member looked carefree amid claims Rossdale, 50, was unfaithful. A source has denied another report alleging he left Stefani in the hospital after the birth of their third son Apollo to cheat with their former nanny. “He is concerned about the kids and wants to keep them safe and is trying to keep all this craziness out of their lives and keep things as normal as possible for them,” a source told PEOPLE. “He’s just all about being the best father he can be for them.” Stefani and Rossdale announced their divorce in August, when they told PEOPLE in a statement: “We remain partners in parenthood and are committed to jointly raising our three sons in a happy and healthy environment.”