Our dear Britney Spears is still doing her best, I suppose, to promote the recent release of her new album Britney Jean as well as the forthcoming debut of her Las Vegas residency show Britney: Piece of Me with the release today of a first trailer for her upcoming documentary film I Am Britney Jean. As you may recall, we learned last month that Britney teamed up with E! to produce a 2-hour documentary chronicling the recording of her album and rehearsals for her Vegas show, set to air on E! on December 22. Click the video embedded above to get your first look at this exciting new doc. I Am Britney Jean will air exactly one week before the first performance of Piece of Me will take place in LV. Can’t wait.