From Ars Technica :

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 irritatingly 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. Once INT_MAX is reached, attempting to record another view will normally roll over to -2,147,483,648.