>I googled Charles Ladder and found two interesting results: "The

>Ladder", song and album by Charles Johnson and "Jacob's Ladder", a song

>by Tina Charles. Does anyone know Marc Okrand's taste in music?

The Beatles, obviously. He even made a (wordplay) pun with the word "Beatle" this year. He's also referenced "Boris the Spider", "Splish Splash", and "Walk the Llama, Llama". Most of his song references are from the oldies and classic rock eras, with that song from a 2000 Disney movie being an outlier.