The Welsh singer became a worldwide star in 2008 thanks to her debut `Rockferry` - which globally sold 6.5 million copies - but admits she found promoting the album difficult and almost quit the music business altogether.
She said: "I thought about walking away, I really did. Not because I thought I`d done it. It`s just that I missed the simple things in life. Life had got so complicated.
"I forgot for a while what my job was, what my role was. I`m not a model. I`m not a celebrity. So who am I? It all gets so complicated. Holding onto your integrity is really difficult."
The `Well Well Well` hitmaker revealed she spent so much time travelling to promote the album that she once forgot what country she was in.
She told Walesonline.co.uk: "One incident that has stayed with me is trying to speak Spanish on a French TV show. That was embarrassing as I didn`t know I was in France. At the end of touring -Rockferry- I needed to be reminded of what I was here to do."
However the 26-year-old singer said she rediscovered her love for music after being contacted by legendary songwriter Albert Hammond - father of The Strokes guitarist Albert Hammond Jr.
She said: ""He asked to meet and I had no idea about his background. We did a few days in LA, a week in Spain, a week in London and it was done swiftly. We had these songs and in my heart they sounded so charming on acoustic demos. And that is what I needed to hear.
Duffy`s second album `Endlessly` will be released on November 29.