AceShowbiz -

Despite the hype surrounding Britney Spears' Las Vegas residency, her recently-premiered documentary didn't get the same amount of attention. In fact, "I Am Britney Jean" which debuted on E! Sunday, December 22 tanked in ratings, with only 706,000 viewers watching it.

In the two-hour special, the "Work B**ch!" songstress opened up about her struggle in the show business, admitting that she might not be suitable for the job. "I have always been kind of shy, since I was a little girl. It's who I am to be modest, so I really can't help it. I turn into this different person ... seriously, bipolar disorder," she explained. "I'm not really made for this industry."

The documentary also gave a look at her preparation for her two-year residency, "Britney: Pieces of Me", at Planet Hollywood Resort & Casino in Las Vegas. "This is a big year for me, it's the first show I've done in two years ... I am trying to let myself relax a little bit but not too much because I know that I have a lot ahead of me," she shared.

The 32-year-old star just kicked off her Las Vegas residency on December 27.