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... because it's catchy and funny. People like the dancing and posing and the catchy tune. This is not much different than teenaged girls screaming when The Beatles played and John, Paul, or Ringo shook their heads and said, "Oooooh" or George shuffled his feat.

This does not mean that "Korean pop music is poised to become culturally dominant" or even that Psy will have a follow-up hit that's as popular.