Britney Spears has landed a book deal that's worth millions -- and she's expected to pour the tea for the massive payout.
The pop star has signed a contract with publishing giant Simon & Schuster ... to recount her life story ... for at least $15 million, according to Page Six.
The outlet reports S&S won a bidding war among other publishers who wanted BS's book for themselves ... and, apparently, it's one of the biggest checks cut for a memoir, behind the Obamas -- who signed on to hawk books through Penguin Random House for over $60M.
No word on when Brit might release this tell-all -- other details, including a potential title, have yet to surface -- but one thing is clear ... Britney wants to speak her truth.
She's been teasing that she wants to dish about everything she's gone through -- be it in interviews, or otherwise -- with tons of Instagram posts lately ... including one in January where she threw up a photo of a typewriter, with a caption that read, "Shall I start from THE BEGINNING???"
Britney has said she's still recovering from the trauma she says she endured in the conservatorship ... but it sounds like she's now ready.
Of course, Britney's sister, Jamie Lynn, also just released her own book -- which we know has pissed BS off to no end.