Jason Earles said in an interview with Jimmy Fallon that Jackson was originally very introverted and shy and could only talk through a puppet he carried with him everywhere. While rehearsing a scene, Earles did so well that the director rethought the character.
Almost every episode's title references a famous song.
Mitchel Musso wore his hair below his ears throughout the show's run to hide his earrings, except for the final season, despite that he could've just took off his earrings.
Singers JoJo and Belinda were reportedly tested for the title role.