Six minutes from “I Am Britney Jean,” a documentary about Spears’ preparing for her Las Vegas residency airing on E!, is now online.

In this exclusive sneak peek at “I Am Britney Jean" (airing Sunday, Dec. 22 at 9 p.m. on E!), Miss American Dream since she was 17 practices choreography, gives a sneak peek at the setlist for the show, and looks back on some darker times in her career.

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