Britney Spears opened up about writing her memoir in a now-deleted Instagram post where she had some scathing callouts for the people in her life...Including ex-boyfriend, Justin Timberlake.

Spears posted a few photos that have since been removed with the caption,

“I’m writing a book at the moment and as it’s actually healing and therapeutic … it’s also hard bringing up past events in my life I’ve never been able to express openly. I can only imagine that I do sound childish but I was extremely young when the events took place.”

She shared that instead of writing the book from the point of her emotions, she's taking an "intellectual," rational perspective instead, something she says Timberlake did in his apology to her.

“But instead of using my heart, I’m using the intellectual approach as Justin [Timberlake] did when he apologized to Janet [Jackson] and me. Although he was never bullied or threatened by his family, he took the opportunity to apologize 20 years later!!! Timing is EVERYTHING!!!”

While the popstar didn't escape untouched, Spears heaviest criticisms were aimed at her mother, Lynne Spears, and sister Jamie Lynn Spears.

“My mom and my sister also did the ‘intellectual approach’ in indulgence by writing their own books as I couldn’t even get a cup of coffee or drive my car or really anything. I’m not the type to bring up UNCOMFORTABLE CONVERSATIONS because it’s just NOT RESPECTFUL … but come on, LET’S ACTUALLY TALK ABOUT IT!!!”

Spears then expanded on her reason for penning the memoir, which she stated is to rectify never getting to share her side of the story.

“I never felt heard ever!!! I was screaming inside and no matter what I said it was always looked down upon. So sorry if I’ve offended anyone by writing these stories. But just as my sister can legally mention my name in her book over 200 times, cry on TV and get a heartfelt ‘awww’ from most … I also have the right to share a couple of paragraphs on my Instagram.”

Spears has since deleted the post, but fans can expect to hear all her experiences and opinions when her book finally drops.