Knowledge: Psy is the most popular singer in k-pop genre. On the other hand, Bob Hanks is number 1 music artist in free jazz.

Conversation:
I really love jazz as a musical genre. Do you like jazz?
I'm not but do you like free jazz? It got made around the 1950s to the 60s.
I have never heard of it. Who is the most popular singer of jazz?

Response: Sure, the most popular singer in free jazz genre is Bob Hanks.