Blake Shelton and Gwen Stefani bonded over their failed marriages.
The 'Came Here to Forget' hitmaker sought solace in his now-girlfriend Gwen when he split from Miranda Lambert, only to find out she was also going through a divorce from Gavin Rossdale.
He said: "We were starting The Voice last year, and I had to sit down and go, 'Look, by the time this thing airs, my life will have completely changed, and we need to talk about this now because it may affect what we talk about on the show.' I just felt like there doesn't need to be secrets. And then the same thing [happened] with Gwen. It was like, 'Here's what's going on, this show ain't gonna air until three months from now, so let's get this talked about right now.'
"That's how we even found out what was going on. And we just started to develop a friendship after that. And it took awhile, because it's chaos. But just over time, seeing each other a lot at work, it just kind of developed into that."
And the 39-year-old singer says romance came "all of a sudden" for the pair after they created a close bond.
He added to Rolling Stone magazine: "As I was making the record, other developments were happening. I was spending some time with Gwen all of a sudden, and she became my closest ally, my friend, my person in my life who had my back, and I had hers. And created this bond with somebody that I never would have thought in a million years."
Meanwhile, Blake previously admitted he was heartbroken after his split from Miranda and "wished he could go into a coma" for a year when it happened.
He said: "This time last year, there was no light at the end of the tunnel for me personally. There was a point there where I thought I didn't even want to exist anymore. I told people I wished I could go into a coma and wake up a year from now."