ABC-DEF-GHI

Big Bird first sang this song during the first season of Sesame Street. In this song, he mistakenly thought that the entire alphabet was one long word, and tried to figue out what it meant.

Big Bird also sang this song with Flip Wilson when he appeared in the premier episode of The Flip Wilson Show.

Big Bird sang this song again in the 1980s, in which he and some kids looked through a trunk of toys and found a scroll of the alphabet, leading to a flashback of him singing this song.

Elmo sang a new version of this song in Sing the Alphabet (CD).

Big Bird sang this song again in the season 34 premier.