Finally, we’ll get some insight into why Britney Spears went a little bit crazy last year – in an upcoming MTV documentary, Britney Spears gives the scoop on her meltdown.

In the 90-minute documentary, titled “For the Record,” Britney Spears says, “I sit there and I’ll look back and I’m like: I’m a smart person. What the hell was I thinking?”

She also comments:

“I’ve been through a lot in the past two or three years, and there’s a lot that people don’t know,” she says.

Sometimes I think I get kind of lonely because you don’t open the gate up that much, you know I mean? 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.”

Look for the Britney Spears documentary to air on MTV on November 30.

Her new album, Circus, comes out two days after the documentary airs.