"This is one of the most literal songs I've ever written. Everything I say in the song actually happened," she said, explaining that producer Ricky Reed had her sit in the studio and talk over a piano loop.
"I sat in the booth and was like, 'So yeah, I remember when we went to Tulum, we pretended we was married.' I talked for like 25, 30 minutes on that loop. And then I felt really raw and sensitive about ita[but] he came back to me and was like, 'Hey, all those words you wrote, I kind of turned it into a song,'" she shared.
At that point, Martin made a video call and heaped praise on Lizzo, telling the star that it's been 'wonderful' to watch her 'taking over' in the music world.
She then thanked him for giving his blessing to sample 'Yellow' on Coldplay and explained the origins of how the song came to be.
"I was with somebody and I was just looking at the stars and I was with him and I was singing it and tears just were coming to my eyes," she recalled.
"You have such an incredible ability to move people with the poetry of your lyricism. So thank you so, so much. It's so real," Lizzo added.
In response, Martin asked how Lizzo's 'guy friend' reacted to her serenade and when the singer bashfully said that he enjoyed it, Martin joked about how his decades-old hit has found new life as Lizzo's 'hookup song.'
"If someone had told me 22 years ago, you know, one-day Lizzo's gonna make out to this song sped up, I'd be like, OK, great," he said.
"It's become Lizzo's hookup song. That's good."
"Baby-making music, baby!" she added.