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 series. He joins Stefani's beau, Blake Shelton, John Legend and Kelly Clarkson.

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.

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"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."

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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.

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“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.”