Although it's no longer 2012, apparently people are still watching the YouTube video for Korean pop star Psy's smash hit song Gangnam Style. The catchy tune has racked up so many views that Google has been forced to upgrade YouTube's infrastructure to cope. When YouTube was first developed, nobody ever imagined that a video would be watched more than 2 billion times, so the view count was stored using a signed 32-bit integer. The maximum value of this number type, 2,147,483,647, is well known to C programmers as INT_MAX.
As for YouTube, upgrading to a 64-bit signed number means that Gangnam Style is safe until it reaches 9,223,372,036,854,775,807 views. That's not likely to occur for another 4 billion years or so.
10 MOST WATCHED YOUTUBE CLIPS OF ALL-TIME
Gangnam Style, Psy - More than 2.153 billion views
Baby, Justin Bieber (feat. Ludacris) - 1.117 billion
Charlie bit my finger - again!, HDCYT - 805 million
On the Floor, Jennifer Lopez (feat. Pitbull) - 975 million
Party Rock Anthem, LMFAO (feat. Lauren Bennett, GoonRock) - 781 million
Waka Waka (This Time for Africa), Shakira - 777 million
Love The Way You Lie, Eminem (feat. Rihanna) - 775 million
Gentleman, Psy - 762 million
Wrecking Ball, Miley Cyrus - 727 million
Roar, Katy Perry - 718 million
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