When calming a stuffed-nose, stressed-out, bored-to-tears, porbably ear-infected toddler, singing can actually work.
So what to do when you are mentally incapable of remembering lyrics? You sing songs that you make up. As you go along. Which is fine for the first half-hour or so.
And then they just all of a sudden turn completely insane. The songs, that is. I mean really, actually surreally, lunatic. This happens because your lyrically-challenged mind can't make up semi-senisible songs for more than half an hour, you see? After that, it's court-room dramas with chicken arguing their case, the travels of a bug into the afterlife after being swatted by someone's shoe, and claustrophobic aliens on Saturn, trying to make their skyrocketing mortgage payments.
Luckily, I don't think she really heard a word of it.