Britney Spears' memoir is filled with shocking revelations, and among the most jaw-dropping are the stories about her encounters with major celebrities. From intimate confessions about her past relationships to unexpected behind-the-scenes moments, Britney spills the tea on some of Hollywood’s biggest names, including Madonna, Justin Timberlake, and even Rachel McAdams. Let’s dive into the top 10 celebrities Britney exposed in her memoir…