How famous is the song Sorry Sorry?

[YA]

I've heard that is the most famous song by them. And I've also seen so many Idols cover it. But the views are just 40million on youtube while Mr simple is 57million. How can it be more famous.

So is Sorry Sorry really THAT famous. And was it famous for it's dance?

[ELF]

it's more famous than Mr. Simple.

Youtube is not the only source of videos and many people did not need to watch it from there because they just bought the album.

In one website (I forgot what website. I just followed the link from Twitter), listed the 10 most viral and popular Kpop hits so far. Included are Fantastic Baby, I Am The Best, Nobody, Gangnam Style, Sorry Sorry, Gee, and I forgot the others. Only Sorry Sorry and Gee had the rating "astronomical" which means immeasurably high. Others, including Gangnam Style, are "high", and the rest are "medium high". The data are scientific and generally accepted.