The pop star will be lifting the lid on her eventful life in a new book – but she has warned it is an emotional journey reliving her troubled past for the upcoming book

Britney Spears has teased fans that they will soon be able to read all about the highs and lows of her personal life as she is currently penning her autobiography.

The 40-year-old pop sensation won back control of her life last November after a 13 year conservatorship that granted her father control of her financial and personal affairs was finally overturned.

The star has lashed out at her family in recent months – saying they didn’t do more to support her while she struggled following a highly publicised break down in 2008.

Now Britney is committing her lived experience to paper and is working on a memoir – which she says has been painful, but necessary, to document.

Taking to instagram over the past week, the star wrote in a since-deleted post: “Writing my book is actually hard after speaking for two hours each time to this lovely lady trying to create drafts…

Since having her conservatorship overturned, Britney has been taking back control of her life – with a wedding and a new child now on the horizon.

Last year, 28-year-old actor boyfriend Sam Asghari popped the question following five years of romance with the star – and the pair are now planning their nuptials.

While further happy news emerged earlier this month when Britney revealed she is expecting her third child – which will be her first with toy boy lover Sam.