Britney Spears

After a tumultuous few years of personal struggle and rebound, Britney Spears is opening up.

In an upcoming documentary, tentatively titled On the Record, the pop star will get candid about her regrets about her behavior and the ongoing loneliness that lurks beneath her stardom.

"I sit there and I'll look back and I'm like: I'm a smart person," Spears says in one scene. "What the hell was I thinking?"

A sneak peek of the film reveals a rare view of the star in contrasts: The lights, the crowds, the paparazzi — and then the the introspection, the insularity, the solitude at the top.

Spears touches on some of the hurdles she's faced, from her divorce from Kevin Federline to her forced psychiatric care and ensuing custody battle over her two young sons. "I've been through a lot in the past two or three years, and there's a lot that people don't know," Spears says.

"Sometimes I think I get kind of lonely because you don't open the gate up that much, you know what I mean?" she continues. "You're guarded. You have to be that way, so 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' documentary, produced with MTV, will air on the network November 30 (10 pm/ET). Will you be tuning in for her, one more time?