Yeah, it's actually an older spoken routine, which she sings a cappella.

Further Thoughts:

"Madman Mora Blues" by Boiled in Lead
"Nuts" by Puzzlebox
Another Willie Nelson, a cover of "Crazy"
"Queen Isabella" by Kristoph Klover
"Honey Pie" by the Beatles
"Captain's Log/Space Madness" by Ren and Stimpy
"Talking Raving Blues" by Darius
A Neanderthal Spongecake cover that escapes me at the moment
"I Pop Pills" by Nate Bucklin
"Shiela" by Tommy Roe
"With Sparklers All Around Her" by Power Salad
"Sonata for Piano and Moron" by Worm Quartet

Hey, that's a good start!