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 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".
i don't know