Gwen Stefani, Cosmopolitan Magazine

James White/Cosmopolitan

Although she's talked about it in what seems like a million different interviews, Gwen Stefani admits nobody really knows the full truth about what happened between her and Gavin Rossdale.

The blonde bombshell covers the September issue of Cosmopolitan magazine, opening up about her love life, heartbreak and moving forward after her divorce.

Stefani admits only her family knows all the details behind her split from Rossdale.

"Nobody except for my parents, the people involved, and whoever they told," she said regarding who knows the whole story. "Nobody would believe it if I could really say what happened. I went through months and months of torture."

Although she doesn't dive into specifics with the magazine, she does allude to something leading to their divorce after 13 years. 

"All you have to do is listen to every single song I've ever written and it's all there," she said. "It's an ongoing theme that I've had for a long time."

Gwen Stefani, Cosmopolitan Magazine

James White/Cosmopolitan

In fact, that's something she found in common with her now-boyfriend, Blake Shelton, who split from Miranda Lambert a month before Stefani's divorce news. The two Voice coaches originally hit it off after writing a song about their heartbreak together.

"We were both having trust issues, as you would if you were us," she recalled. "It was like, I have so many problems. How can I now be getting into another potentially huge problem? What am I doing?"

She continued, "Blake wrote the song and sent it to me. He was like, 'Help me finish it.' I wrote a verse and sent it to him, but he was gone because he doesn't live in L.A. He didn't have Wi-Fi, so he wasn't answering me back! As soon as he came back to town, he brought his guitar over. We were like, 'We wrote a song together! This is crazy!'"

Gwen Stefani, Cosmopolitan Magazine

James White/Cosmopolitan

Of course, now they're enjoying being in love—a happy ending to some very difficult times for them. When they look back on their time on The Voice together, they can't help but giggle, having no idea back then what would transpire today.

"We were laughing our heads off when we saw the blind auditions," Stefani admitted. "They for sure edited stuff to look like we were flirting. They chose to run with that story before anything was even real. I hardly knew him. But it was like it was in the air—happening before it happened."

Blake Shelton, Gwen Stefani, 2016 BIllboard Music Awards, show

Kevin Winter/Getty Images

Meanwhile, Shelton and Stefani made things official in November 2015, three months after her August 2015 from Rossdale.

Stefani filed for divorce after Rossdale's alleged cheating scandal with their nanny Mindy Mann, finally reaching a divorce settlement in April of this year.

According to the documents, obtained by E! News at the time, Stefani is keeping all the rights to her No Doubt music, while Rossdale maintains the rights to his Bush music. Gwen also has complete control over her popular fashion lines L.A.M.B. and Harajuku Lovers (however, the singer agreed to put 25 percent of her L.A.M.B profits in a trust, presumably for their three kids).

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