Gwen Stefani left her London hotel with son Zuma ahead of her appearance on the UK's X Factor on Sunday. Gwen and her band, No Doubt, gave a live performance of their latest hit, "Looking Hot," off their recent album, Push and Shove, for the show. The new single is currently the center of controversy, as Gwen and the band faced criticism after releasing the track's music video. Gwen, who was dressed in Native American garb for the shoot, received negative feedback from the Native American community. Shortly after, No Doubt made a public apology and ultimately pulled the video. Gwen's pushing on amid the scandal, however, continuing her trek around Europe in the company of Zuma. Today, Gwen and Zuma departed their London hotel to hop on the Eurostar to Paris.