Beca dismisses film endings as predictable, specifically the reveal that Darth Vader is Luke's father in Empire Strikes Back on the grounds that "Vader" means father in German — but it doesn't. In fact, the character of Darth Vader predated the idea of Vader being Luke's father when Star Wars was originally conceived, so at best she is Right for the Wrong Reasons. It's an annoying inaccuracy, but this also shows us a certain amount of know-it-all-ism found in many college students.
Cynthia Rose is the one who starts singing S&M in the Riff-off, and the actress Ester Dean actually wrote it.
She also co-wrote "Party In The USA", so it makes sense that she's the first one to join in on the bus.
'Bellas' means 'pretty girls' in Italian, so there is some justification as to why the traditionalists believe they should be so.
'Bella' is only the singular feminine form of the word meaning 'beautiful'. The plural (feminine) form is 'belle'. The Italian language does not add an 's' to singular adjectives to make them plural.
The reason Bumper hits on Fat Amy? He knows about the "no Trebles" rule and is trying to sabotage them.
But he totally actually likes her.
In the sequel both Jessica and Ashley, dismissed yet again, say that they're Jessica. It's a hilarious line. However, there's Fridge Brilliance of it being one of either A. They have genuinely forgotten, too. Unlikely, but possible given that they're just Those Two Guys. B. Ashley knows that nobody actually knows or cares and because the pair are always referred to as "Jessica and Ashley", she'd at least like to come first. More likely, and pretty funny in itself.
In the first film, Aubrey is very determined to make sure that the Bellas do the same set every time they perform. She says early on that the Bellas never break tradition, but there's another way to look at it. All three times we see them perform The Sign/Eternal Flame/Turn the Beat Around, something doesn't go according to plan. The first time, Aubrey vomits, ruining the Bellas' chance at winning. The second time, Fat Amy improvises and steals the show. The third time, Beca tries to sing Bulletproof to spice it up, but that costs them the competition. This shows that, at least since the vomiting incident, Aubrey had the group perform the same songs so eventually they could get it right, without any interruptions or screw-ups, becoming a bit of a perfectionist, at least for her own self-satisfactory needs.
Is Fat Amy really the best choice to drive the bus? She is, after all, the ONLY member of the team who (as the resident Awesome Aussie) would have learned to drive on the other side of the road. (Kinda surprised they missed this opportunity for comedy, really.)
Chloe really was disorganized at the start of the film, like Alice says.