Prepare to be teased: the first clip from Britney Spears’ upcoming documentary, “I Am Britney Jean” made its debut on Friday (December 13).

The teaser hits fans with some serious scenes, including Britney rehearsing for her upcoming Las Vegas residency, as well as detailing the tension she faces on the road and in preparation for her concerts.

The 32-year-old also revealed that she had suffered a neck injury that may have threatened her performances, saying, “I couldn’t do rehearsals the next day…I just knew I had almost broken my neck or something…There was serious damage.”

Britney’s team is also seen worrying about the pressure placed on the pop star’s shoulders, and and whether the show will be ready on time, as Birtney herself states, “I’m really nervous…What if I blank out and just stand there?”

“I Am Britney Jean” will be a two-hour special promising behind-the-scenes features of Britney’s new album and personal life. The movie makes its debut on E! on December 22nd.

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