Wieden + Kennedy tops the list of 'most viral' creative agencies in 2011, according to Ad Age's round up of the most-viewed videos in social media in 2011. Spots for Old Spice and Chrysler by W+K Portland racked up over 190 million views, more than twice as much as the next agency.

W+K Amsterdam also made it into the top ten, at number nine, with 29.5 million views for Heineken and Nike spots.