Blake Shelton made an appearance on The Tonight Show Starring Jimmy Fallon on April 13 and his girlfriend, Gwen Stefani, joined in on the fun.While Shelton chatted with Fallon about being quarantined on his property in Oklahoma with “a bunch of Stefanis,” Stefani appeared with some tools to shape Shelton’s mullet.“I had to cancel my tour,” Shelton said of the coronavirus pandemic. “We were in Omaha, Neb., building the production that day and that’s when the bottom was falling out of touring and any live events, so we just cancelled, and Gwen and I came immediately here and we have not left.”While Shelton said he and Stefani are “learning how to bake sourdough bread” and likened their current time together to Little House on the Prairie, she.