Psy
Himself
6.52011
8.52014
6.82016
8.32023
6.92018
7.52018
7.62016
7.91981
8.71994
7.82003
7.32002
8.52008
7.82010
8.22019
7.22017
7.22012
7.62009
8.22000
8.22012
7.62015
This is the story about the revolutionary change of YouTube.