I used to listen to Kesha's unreleased material, but I stopped, and I recently started listening to her unreleased material again...and now I understand why most of them never made her albums. They're not really album material
"Run Devil Run", "Butterscotch 1.0", "Booty Call", and "**** Fake Hippies" should all have made it to the albums because all of them are close to being her best songs ever.