Sneak Peek At ‘I Am Britney Jean’ (VIDEO)

The documentary "I Am Britney Jean" follows Britney Spears as she prepares for her performance residency at Planet Hollywood Resort and Casino in Las Vegas, along with behind-the-scenes footage of video shoots, recording sessions and being a mom. The documentary premieres tonight at 8 p.m. on E!, but we've got a sneak peek just in case you can't wait.