Credit:
Whether that meant influencing YouTube marketing with a viral advertising campaign or mobilizing the online communication of an entire political movement, people are discovering that social media is one of the most powerful vehicles for change the world has ever experienced. In 2011, people were not only affected by social media -- they actually effected social media change itself.
We've highlighted 19 influential social media moments of the year. Some will make you giggle, while others will cause you to cringe. Either way, they contributed to a better informed and more entertained global community.
How do you predict social media will effect change in 2012?