>>48489380anon, singers are up there with guitarists as the musicians with the least need to know how to read sheet music. yeah sure it helps but for most purposes you don't need it, especially when you're only working with one voice. besides, she showed she actually has a basic grasp of it since she could read how the pitch moved and how long the notes were to an extent, the only thing she truly fumbled was not realizing tied notes are not meant to be read as standalone notes.
so many fucking musicians throughout history know jack shit about how to read sheet music it's not even funny.