By Jessica Goodman
November 20, 2015 at 02:16 PM EST

Gwen Stefani visited Ellen on Friday and shared the story behind her latest song, “I Used To Love You,” which she also performed on the show a few weeks ago.

“It was super emotional,” Stefani says of the performance. She had written the song just as news broke that she and Gavin Rossdale were going through a divorce. “I’m having a lot of fun. It’s like a whole new life, a whole new new chapter,” she says. “It’s so fun to be on The Voice, to be around that music.”

She also spoke about Blake Shelton, her boyfriend and Voice co-host. “I didn’t even know who he was before I was on the show,” she says. “He knows every single ’80s songs. He’s a musical jukebox.” (She wouldn’t confirm if he was a good kisser, though. Nice try, Ellen.)