This video was edited, so it's not that epic, but still interesting to see someone syncing it the other way around...
A while back I posted a thread about someone who accidentally synced Let It Go to Disney's High School Musical with Bet On It playing and the synchronization fit so well, it was creepy...
1:45 "Let It Go, let it go" and Zac does the arm motion of doing snow magic
2:45 "Past is in the past, let it gooo" when Zac slaps the water.
If you want to see the actual song "sync" with Frozen, it's here. But as you can see it doesn't sync that epic as Bet It Go...
The lyrics to Let It Go sync with Zac's motions/movements. Basically. Like if you watch it, it barely looks like it's been edited over with the wrong song...