Gwen Stefani and Blake Shelton certainly made the most of their time in lockdown while staying at the country singer's ranch in Oklahoma.MORE: Gwen Stefani as a brunette has to be seen to be believedThe celebrity couple filmed a music video for their hit song, Happy Anywhere, and while opening up about the filming process on Monday's Ellen, the star revealed that they had been joined in quarantine by more people than you may have thought.As well as Gwen's three sons, the No Doubt singer's