Britney Spears is about to tell all in a $15 million book deal.
Publishing insiders told Page Six that Britney signed the deal with Simon & Schuster for her tell-all memoir after a bidding war from multiple publishers over her book.
An insider called the deal is "one of the biggest of all time, behind the Obamas."
Britney will finally be telling her story after her sister Jamie Lynn Spears released her book earlier this year.
Britney was mad about the book and called her "scum."
"Congrats best seller…..The nerve of you to sell a book now and talk sh*t but your f*cking lying…..I wish you would take a lie detector test so all these masses of people see you're lying through your teeth about me !!!! I wish the almighty, Lord would could come down and show this whole world that you're lying and making money off of me !!!! You are scum, Jamie Lynn."