Despite what Anna Kendrick's character claims in the movie, Vader (of Darth Vader) does not mean 'father' in German, but it does in Netherlands Dutch. Both the Dutch 'vader' and the German 'Vater' are pronounced with the 'a' as in 'far', instead of the 'a' as in 'later'. In the German dubbed version of the film this was changed, and Kendrick says that Vader means 'father' in Netherlands Dutch.
When Beca enters the radio station for the first time, the station's frequency is written on the outside window (85.7) but DJ Luke's voice is heard in the background saying the frequency is 95.7 (.."music for the independent mind".)
The story line between Bumper and Fat Amy was not in the script. Adam DeVine and Rebel Wilson would improvise during their scenes together, and Devine would often try to kiss her. This led to Devine and Wilson to create a back story for their two characters and their relationship. The film makers thought the hostile, sexual chemistry between the two was funny and kept some of the scenes in the film - though according to the two actors, there was a lot that was cut out, including a reference to a one night stand.
In the finals, as the Bellas are about to go on stage for their performance, Beca is the one to lead them out. In the next shot, Chloe can clearly be seen as the first to emerge onto the stage.
When Beca and Jesse are in the studio talking, Becca's hair is tucked behind ear when she is facing Jesse, but when she is looking down her hair is down in her face.