Character mistake: When Aubrey is telling the Bellas that they will practice two hours a day, seven days a week, the board behind her states that on Sundays they have the day off. (00:35:05)
Continuity mistake: Sean and Emily spend the night on a boat after her first mob. The blanket lies differently in consecutive shots. (00:45:25)
Visible crew/equipment: At the end of the movie when Sparkle is on stage singing in her red dress, a camera shot pans upward toward the ceiling on the stage. There is a cameraman backstage walking on a rafter or something, trying to run so as to not get caught on film, but fails.