The 20 Most-Viral Ads of 2012

A 30-minute nonprofit video outlasts Google, Coke, VW and Nike to take the top spot

A controversial 30-minute video by a little known nonprofit far outpaced efforts from multinational marketers like Google, Coca-Cola, Volkswagen and Nike to take the top spot on Unruly Media's list of the 20 most-shared ads of 2012 in social media.

@nudd Tim Nudd is a former creative editor of Adweek.