The couple had been married for 13 years, when they split in February 2015. "At that time, everything was like, I had no skin, it was so raw, you know what I mean," she told host Lee Cowanand. "Nobody knew what was happening and I had this big secret."

Like many a musician before her, she turned that pain into music, a process that helped her heal. Stefani shared, "During that time period, I felt like, I was down all the way. Like you don't go down lower than that. It was rock bottom. I was so embarrassed, you know what I mean? I was like, 'Wow, I can't. I have to turn this into something. I can't go down like this. Like if I can do music, then maybe just everything will be okay."