The No Doubt singer was in the hot seat about her relationship, but her big news had nothing to do with her beau.
"How's life with the sexiest man in the world?" the host asked almost immediately after the singer sat down for her interview. "Gosh, that was quick, I was wondering how long that was going to take," Stefani responded. "He got sexier, it just keeps getting better and cuter and more country," she added.
When Ellen brought up tabloid speculation about the status of their relationship, Stefani clammed up. "I get nervous when you talk to me about him, I don't know why, but I feel like the cameras are rolling and I shouldn't say something, but go ahead," she said, before DeGeneres asked whether the two of them are getting married anytime soon.
"You've been together a long time, it seems like you will, unless both of you have had not good experiences and decide this is good enough and keep it as is," DeGeneres continued, alluding to the couple's past marriages with Miranda Lambert and Gavin Rossdale. "I think you should get married," she added, after Gwen asked for the host's two cents on the matter.
"What are you doing?! My god!" Stefani said with a laugh. "I love weddings, the kids love him, we love him, he's lovable. I think about it all the time."
Then it was time for Gwen's big announcement, something she was "freaked out" about revealing on the show. And no, it's not a pregnancy.
"I'm going to be doing my first ever Vegas residency," she told the audience.
Her show, "Gwen Stefani – Just a Girl," will kick off at the Zappos Theater at Planet Hollywood Resort & Casino beginning Wednesday, June 27, 2018. She added that $1 of every ticket purchased will be donated to Cure 4 The Kids Foundation, a Vegas charity that provides medical treatment to children facing a number of life-threatening conditions.