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The singer, who is preparing to release a new album, admits in a trailer for the show: "I've been through a lot and there's a lot that people don't know."
Spears is also set to touch upon the loneliness of celebrity life in the programme, to be shown on 30 November.
She recently won three MTV awards after a period which saw her lose custody of her sons and be admitted to hospital.
'You just cope'
In a taster for the documentary, Spears reflects on erratic behaviour which characterised her troubled period.
"I sit there and I look back and I'm like, 'I'm a smart person. What the hell was I thinking?" she says.
Speaking of living life in the public eye, the singer adds: "I'm kind of stuck in this place and it's like, how do you deal? And you just cope, and that's what I do. I just cope with it, every day."
Spears is expected to touch upon her stays in a psychiatric facility and the custody battle with her ex-husband Kevin Federline.
The singer is on the comeback trail, making a favourable impression at the recent MTV Awards after her much-criticised performance at the show in 2007.
Her sixth studio album, Circus, is due to be released on 2 December, which is her 27th birthday.
Spears is also due to visit the UK to appear on The X Factor, expected to coincide with the release of her new record.
(BBC)
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