The guy battling J-Hope during Jason Derulo's Wiggle.

Here's another:

Guy in the cap (in the beginning of both videos on the right - if it is the same guy in the AHL vid and 2AM dance vid) is named CJ Salvador. 
And I really love his style. 

His style is somewhat like a contortionist because it's very jelly-like and fluid-like. 

Point of sharing: 
I envy dancers.