'Let It Go' Performed On Classroom Instruments With Idina Menzel, Jimmy Fallon And The Roots (Video)

"Let It Go," the centerpiece song from billion-dollar Disney flick "Frozen," went viral long before Jimmy Fallon got his hands on it. But that doesn't mean the "Tonight Show" host's go-to viral trick -- performing hit songs on classroom instruments played by The Roots -- isn't as effective as ever.

But while Fallon usually does this with pop songs like "Call Me Maybe" or "Blurred Lines," the Oscar-winning song is an even more adorable fit considering it's, ultimately, kid's music.

Plus, this must be a much more enjoyable way for Idina to go viral, as opposed to, say, John Travolta calling you Adele Dazeem in front of a billion people.