Watch these siblings play the piano – backwards

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This brother and sister don’t just have “Frozen” fever, they have played the song so much they know it forward and backwards.

As in, they can play it with their backs to the piano.

Jason and Sara celebrated the announcement of a sequel to Disney’s “Frozen” with a medley of music from the movie, played with their special twist.   Their YouTube video has more than two million views.

You have to see it to believe it!