Disney

Go behind the music with the people that made your favorite "Frozen" tunes.

Have you ever wondered what it would be like to be in the same room as hundreds of other "Frozen" fans -- including, but not limited to, John Lasseter, Kristen Bell and Josh Gad -- singing "Let It Go" as snow falls down on you from above? Of course you have!

Disney's D23 fan expo treated fans to a delightful "Frozen" celebration on Sunday (August 16) afternoon. Hosted by Chris Montan, the studio's famed executive music producer, "Frozen FANdemonium" honored the music of the record-breaking animated film with the people who made the musical magic happen. Oscar-winning songwriters Kristen Anderson-Lopez and Robert Lopez, along with stars Bell (Anna) and Gad (Olaf), took fans behind the music of "Frozen," revealing early demos of first attempts and the inspirations behind some of the movie's biggest hits. And yes, there was lots of singing.

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Like most things at Disney Animation Studios, it all started with an idea from Lasseter. The animation head wanted to make a movie in a similar vein to its early '90s classics "The Little Mermaid" and "Beauty and the Beast," where the songs not only expressed the emotions of the characters, but they also raised the stakes.

"We had the chance to work for John," recalled Anderson-Lopez. "If he had asked me to write a Ritz cracker commercial, I would have done it. Because he's a genius."

Director Chris Buck had shown the couple some early storyboards that depicted two sisters, and they were inspired by one in particular: a photo of a young girl looking up at her older sister, and her powers, in amazement. That would become the framework from which the memorable music of "Frozen" was conceived. Here's what the songwriters and cast of the film had to say about some of your favorite songs: