Ticketing site Eventbrite gets more traffic from Facebook than any other source.

Since the two forged a partnership in 2008, events listed on Eventbrite have doubled in number, and every share of a listing on Facebook has brought in an additional $12 in ticket sales on average.

Without Facebook, Eventbrite wouldn’t have been able to move almost 20.8 million tickets during 2011; a breakdown of these sales appear in the infographic below.