“Into The Unknown” is just one of seven songs that will be featured in Walt Disney Animation Studios’ upcoming Frozen 2. Sung by Idina Menzel, it is an extraordinary ballad that is paired with a stunning sequence that is perfectly choreographed and staged. We got a small one-look sample of the sequence during the D23 Expo, where it was met with a huge amount of applause.

During our recent sneak preview of Frozen 2, Geeks of Doom and a select group of journalists learned about what goes into making a visually stunning musical sequence, including the costumes, hair design, effects, and more.

Check out how visual development artists, the story team, music producers, the animation team, and what the effects artists had to say about what it takes to put a musical sequence together below.