Little Squirrel

Little Squirrel is a short lullaby by Gumball sung in "The Boombox" in an attempt to subdue a squirrel to sleep. It is abruptly cut off by the animal attacking him. It is currently one of the show's shortest songs.

Lyrics
Gumball: Go to sleep little squirrel. (whistles)

Trivia

 * Gumball's whistling sounds a lot like Zelda's Lullaby from the Legend Of Zelda games.