A-B-Chorus Line was the working title of a proposed Sesame Street special meant to commemorate the show's 10th anniversary. The sixty-to-ninety minute special was to lampoon the plot of the Broadway musical A Chorus Line. The special ends with the final callbacks, where all the regular characters are present. Together, they sing the "Sesame Street Theme" as the show dissolves back to the present, where the cast continues singing the song with a flood of kids who've just arrived.