Instead, Stefani, 50, 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."
In addition to her Las Vegas residency, Stefani, who just rang in the big 5-0, has another reason to celebrate.
She and fellow coach Shelton, 43, are reaching a milestone in their relationship: four years of dating.
The couple first met on the set of "The Voice" in 2014 and sparks quickly flew.
“It’s actually shocking that it has already been that long,” Shelton admitted to People in June. “It’s kind of a blur. It still feels like it’s pretty new to me. I guess it is, relatively. Four years isn’t forever, but man, it seems like it just happened in no time.”