Gwen Stefani announced she will not be returning as a coach for Season 18 of "The Voice." The news comes after Nick Jonas was revealed to be a new coach on the singing competition show. He joins Blake Shelton, John Legend and Kelly Clarkson. Instead, Stefani will focus on the final dates of her "Just a Girl" Las Vegas residency at Planet Hollywood's Zappos Theater in February and May 2020. "I didn't expect to be doing [the Vegas show] and 'The Voice' at the same time," the singer told Entertainment Tonight. "I just feel like I'm alive in a way I've never been before, because I have to be! Because doing both is a lot."