what was the assignment omg
I was writing a short assignment about the medieval notion of what a "work" was - in modern language, what we might consider to be the canon version of a text. And because Sabrina Carpenter adds different lines at the end of "Nonsense," that's like roughly equivalent to the changes in performance that you get with medieval bards, who would sometimes forget lines or add lines in performance, whether those changes were spontaneous or premeditated. And some of the changes she makes are funnier or more resonant than others. I think we're all fond of "I've got a personality but no tits/This song is not about Joshua Bassett" and the one she did on the BBC got attention for being somewhat obscene (by the BBC's standards), so those might get remembered while other ones don't get remembered or recorded. So that shows how different variations can be made and then also how certain ones can survive.
BUT the key difference between the modern and medieval performance is that the CD/Spotify recording exists as the "official" version. So when she adds something, it's a deviation from what might be considered the definitive or canon version. In medieval thought, however, all the versions taken together comprise the "work," so there's a different way of thinking about it.