Last updated on: 09/16/19What’s This (Song)Listen to What’s This: First Appeared In: The Nightmare Before ChristmasWritten By: Danny ElfmanPerformed By: Danny ElfmanDebut: 1993Disney Category: Disney MusicRelated Disney Items and TopicsThe Mob Song (Song)The Silly Song (Song)Sally's Song (Song)Happy Working Song (Song)Oogie Boogie Song (Song)How Far I'll Go (Song)