‘Shake It Off!’ Taylor Swift song fits perfectly with 1980s aerobics video routine

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The song is part of Taylor Swift’s new album, “1989.”

But it’s also the perfect tune for this mash-up using an aerobic dance video from the 1980s!

Swift’s hit, “Shake It Off,” was set to the dance routine in a video on YouTube that went viral this week.

The dancing in the video appears to be perfectly synced to the song — as if it were being played during production.

Click above to watch the mash-up.