Just when you thought that Gangnam was going out of style, another new dance craze has gone viral. The Harlem Shake is a classic that has been turned into a free-for-all in a new video on the web that's now ricocheted around the world. To explain and to show us how to do it - old school and new school - dance instructor and choreographer Megan Adams is here.

To take a class from Megan, click on any of the websites below for class information:

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