Gwen Stefani is selling her divorce as a 'juicy story'

Los Angeles - Gwen Stefani admits the reason her marriage ended is a "good, juicy story".

The 46-year-old singer split from husband Gavin Rossdale last year after 13 years of marriage, and though it has been rumoured he was unfaithful with the family nanny, the No Doubt star won't divulge the reason for their separation, partly for the sake of their sons Kingston, nine, Zuma, seven, and Apollo, two.

She said: "If I could, I would just tell you everything, and you would just be in shock. It's a really good, juicy story."

Gwen returned to songwriting and admitted being in the recording studio was a huge help, she said: "I thought, 'I have to make music out of this. That's what God wants for me'.

"Being in that room and being creative, it was the only place that felt good -- I was like, I love the smell of this room."

And these days, Gwen - who is now dating fellow The Voice coach Blake Shelton - is having an "awesome' time, though she is still coming to terms with the end of her marriage.