The freestyle rap sensation Harry Mack went viral for his effortless flow and joins NBA on TNT to rhyme live in Studio J.

"In the '80s, when we said we wrote a freestyle rap, that meant that it was a rhyme that you wrote that was free of style," he explained. "It's basically a rhyme just bragging about yourself." ...

Improvising in rap is often known as freestyle ... There are two types of freestyle: ‘Old-school’ freestyle, which involves rhymes that the rapper has already come up with, but doesn ...