Stop SOPA. The death of Whitney Houston. Linsanity. The rise of Pinterest. Kony 2012. Facebook acquires Instagram. Call Me Maybe. The London Olympics. A new look for Twitter. One billion users. Felix Baumgartner’s record-breaking jump. Hurricane Sandy. Obama’s re-election. Gangnam Style.

All of this took place in 2012. And each one of these events went viral on social media.

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