The Little Mermaid's Part of Your World lyrics structured against Frozen's Let It Go melody.
Original video edited to fit sequence, however scenes were reused to fill the time. Mouth syncing occurred whenever possible without redrawing the mouth (not all scenes have edited lip sync).
Vocal credit: Singer who wishes to remain anonymous
Non-professional singer and non-professional audio production, so yes, it's not perfect.
Sorry for some who can't view this video. It is blocked for you due to Youtube's automated copyright claims system. I'm debating about disputing it as fair use, but I've read I don't have a chance. If this does get taken down, I will be reloading a newer version that will be completely legit.