Zumba Time - Just ask your sister

I have three sisters and for my 2nd sisters' birthday party, the girls went out to do something called zumba...I do not know what it is, but I guess it was some kind of dance since it would be something they would do...So later on I thought I'd Google it and find out more...So it's a new fitness craze! I can see why they like it...

So here is a popular You Tube video of it...