Earlier this year, it was rumored that Britney Spears sold a “tell-all memoir” to publishers Simon & Schuster for $15 million. In a recent Instagram post, Spears said that the memoir will be out at the end of this year. “I want to talk about secrets!!!” Spears wrote in the post. “The secrets I’ve had to hold the past 15 years I will say are honestly paralyzing.”