What plot follows Barden University's all-girl a cappella group, The Barden Bellas, as they compete against another a cappella group from their college to win Nationals, and starred an actress known for her role of Alexis in the party film "Project X"?
Alexis Knapp:  She is known for her role as Stacie Conrad in the musical films "Pitch Perfect" (2012) , "Pitch Perfect 2" (2015) and the upcoming "Pitch Perfect 3". Alexis Knapp:  She is also known for her role of Alexis in the party film "Project X" (2012), and her role on the first season of the TBS comedy "Ground Floor". Pitch Perfect: Pitch Perfect is a 2012 American musical comedy film written by Kay Cannon and directed by Jason Moore.
i don't know