Presumably, this will be a little more revealing than Crossroads: Britney Spears has signed a nearly $14 million deal to write an autobiography, the Daily Mirror reports. The 27-year-old star may drop some bombshells unofficial biographers never uncovered, a source says: “Some of the stories she’s got are absolute dynamite. She’s kept diaries so there’s nothing she’ll leave out unless she wants to.” (More Britney Spears stories.)