In the book Dr. Seuss's ABC, You will see Icabod and his sister Izzy singing the alphabet at the end of the book before going to the letter "Z" to meet the Zizzer-Zazzer-Zuzz. In the Random House Beginner book video version of this book being used. So the voice director decided to have that segment being sung instead of spoken. Colin Carman and Angelique Claire Sirois and the main Narrator Marian Hailey Moss were chosen to sing the alphabet on in this scene and at the very end of the book where the backing pages where used in the scene..