The singer has put pen to paper for I Am Charlie Wilson, an autobiography which will centre on his upbringing, his rise to fame and his struggles with alcohol and drug addiction, which left him homeless in the mid-1990s.

He is also expected to detail the disbandment of the The Gap Band and he insists it will be an interesting read.

He tells Billboard.com, "There's some things in there a lot of people don't know about me, so I'm gonna tell it all.

"My problem is I tell the truth all the time. A lot of people don't like you telling the truth, and it gets sticky in places. This is not an 'I'm pointing the finger' book, but I am telling the truth and I just start when I was a little boy and take everybody on a journey, my journey that I'm on right now. I'm telling you how my life unfolded from when I was about three years old all the way up until I had my first hit record and all the way up to the last Gap Band hit record and everything that happened."

He continues, "There's a few Gap Band stories in there for sure. People always want to know what happened to the Gap Band, the derailment of it all. So it's in there."

Wilson hopes the book will get optioned for the big screen, and if it does, he will already have the music prepared.

The 62 year old reveals people have always suggested Ray star Jamie Foxx would be a good fit to play Wilson in a biopic, and he adds, "I'm already writing songs for a soundtrack; that's what I've been doing lately. As I go back through my life, reading the book, I'm coming up with some next stuff, I think. The lyrical content is a lot different. If (the book) happens to go to movie status, the songs will definitely fit."

The memoir will hit U.S. retailers on 30 June (15).