Okay, I'm probably the last person to know about this, but I saw a clip on some morning show this morning and went on-line to look it up.

I laughed until the cats hid under the bed.

Since my computer expert is not available (and I'm a total idiot) I can't do a link, so you're gonna have to google "evolution of dance" and click on the first link.

Update by "computer expert" - EVOLUTION OF DANCE.