The 25-year-old singer - who was born in Los Angeles, California, and was brought up in Nashville, Tennessee - will unveil `My Crazy Beautiful Life` on November 20, and she admits while not every tale of her life is "glamorous", the story she has to tell is completely genuine.
She said: "Sometimes, it feels as if the last few years have encompassed a few decades. You might have heard my voice on the radio, seen me on stage and on the red carpet, or in a music video, but that`s only a part of the story.
"In these pages, I`m revealing a more complete picture of what my life is really like. It`s not all glamorous and it`s not all pretty, but it`s all real."
The `Tik Tok` singer - who is releasing her second album `Warrior` in December - admits her life has gone supernova in recent years, and she is now living out her life-long dream of being a pop star.
She added: "In less than three years I`ve gone from being the worst waitress in LA to living out my childhood dreams of singing my songs to people all over the world."