Continuity mistake: When the Bellas just got told that they are not allowed to compete any more they walk outside and Beca gets a call. When the camera is zoomed in on her you see her calling and moving a lot. When the camera is focusing on the other Bellas she is standing completely still in the background. When the camera is back on Beca she is moving again. (00:12:50)
Continuity mistake: In Pitch Perfect there was a flower tattooed on Beca's shoulder, it's not there anymore.
Continuity mistake: In the final scene, after Amy slides down the stairs on a sledge, the sledge magically reappears at the top of the stairs for Emily to slide down too.
Continuity mistake: Before the Bellas' second performance, one of the girls is getting her natural hair braided. When the performance begins, they are completely different braids with added extensions.