What is the most popular form of dance in the world?
Well, in the 1920's Swing was the most popular.
That was a long time ago. Do you think swing dancing is still popular today?
No, actually hip hop dance is the most popular today. 
Oh I see. Sometimes when I hear the hip hop music, I feel a little bit sad.
Sorry to hear that it makes you sad. They say there are some quite depressing rap songs. 
It makes me sad because my grandmother used to love hip hop dancing, but she passed away from a heart attack during one of her performances.
Oh my, I am truly sorry to hear that your grandmother suffered a heart attack. She was doing what she loved, hip hop dance?
Yes she loved performing. She taught me everything I know about hip hop dancing.
Hip hop dance is a lot of fun, but hard work if you want to do it well!
Is it common for hip hop dancers to die from heart attacks while performing?
If they are unhealthy or over weight it can have an effect on their hearts. But as far as it being common I can not confirm or deny. 
Do you know of any online dance lessons that I could take?
You can go to DanceClass.com and check there for their variety of classes.
I will check that out. Thanks for the information!
You're welcome. I hope you decide to look for an online class so you can go at your own pace. You should also check out DancePlug.
OK I will look at them as well. Thank you
Just remeber the wisdom and unconditional love your grandmother had for you. 
That is really good advice! I will always remember her. Even in her old age, everyone loved to watch her dance. She was really an amazing person.
Well music is known to stimulate pleasure and reward areas in our brain. And it is also said evidence indicates that humans like watching other people in motion.