During the fly-on-the-wall show, Britney talks about her break-ups with Justin Timberlake and Kevin Federline. She says of the split with JT: 'With Justin he was a part of the magnitude of what I've become. When he was gone I was like, What am I supposed to do with myself?"
'I was devastated, but I handled it a lot better than the one with Kevin Federline.
'With Kevin, cos I had two children with him, I did not know what to do with myself. When it ended, it was just like I felt so alone. I didn't want to really think about the reality of it. I never really faced it and I just ran.'
She also talks about the infamous head-shaving incident saying: I'm a smart person, what the hell was I thinking?
Click on the clip below to watch a sneaky preview, and if you still need more of a Britney fix, click on our other clip to watch her on Saturday's X Factor again. Anyone else a little under-whelmed by her performance?
For The Record is on Sky 1 and Sky 1 HD at 8pm tonight.