Anna Kendrick's Pitch Perfect laughter

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Based on a book by Mickey Rapkin, Jason Moore directs this 2012 comedy musical centered around an all-girls acappella group called The Bellas. After years of embarrassing performances at the national finals, the group is in a slump when they wind up recruiting an energetic freshman named Beca (Anna Kendrick). As the newbie sets out to re-vamp everything from the set to their music, The Bellas' enter a much-needed rebuilding process. Their goal is to make it to the campus championship, where they'll take on their male rivals.

October 6th, 2012

Anna Kendrick found it difficult to stop laughing when filming scenes with Rebel Wilson.

The pair star together in 'Pitch Perfect' and Anna found her 26-year-old co-star so funny, she reverted to unusual techniques to stop herself ruining scenes by giggling.

She said: ''I did a lot of weird stuff so we wouldn't mess up takes ... stepping on my own foot, biting my tongue.''

Anna also revealed she can relate to her character Beca, who joins an all female a cappella group.

She added to Us Weekly magazine: ''I used to sing in the shower. But I got enough sarcastic clapping from my roommates that I broke the habit.

''Now I still sing in the car like a dork. I hope if people see me it just makes them smile.

''I don't like performing in front of an audience but music is such a part of me that if I couldn't sing I'd feel paralysed.''