There’s no stopping the “Frozen” fever.

Just one night after Idina Menzel performed “Frozen’s” hit “Let It Go” at the Oscars — which also earned the award for best original song — she appeared on “The Tonight Show” to perform a treat for the kids who stayed up late enough to watch it.

Menzel, Jimmy Fallon and The Roots performed the ballad with classroom instruments, including a triangle and a xylophone, giving it a fresh twist. The video has already hit more than 1.5 million hits on YouTube.

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