Sneak peak at Brit's new doco

THIS is the first sneak-preview of the video everyone wants to see.

Britney Spears reveals her inner deomons as she chats candidly about therapy, her marriage, and music for 90 minutes in the tell-all documentary, For The Record.

The former train wreck pop princess is seen smiling, laughing and looking healthy - but admits the past few years have been tough. Good for her, we say.

"There's a lot that people don't know about me that I want them to know," she said.

"I've been through a lot in the past two or three years and I've definitely grown up, big time.

"I sit there and I look back and I'm like, I'm a smart person...like what the hell was I thinking?"

The documentary airs in the United Kingdom on 1 December on Sky 1 and in the United States on MTV on 30 November.