El Clásico is the most important football match during the spanish football league. Real Madrid plays against F.C. Barcelona, and there's a lot of social media attention in the previous days and at the moment of the match.
We created an app in which you bet your status for a week against the supporter of the other team. If you lose, your friend can post in your Facebook wall, messages against your team, or hailing the football team you would never support.
Result: 16.794 hahaha, 23.511 question marks, 8126 WTF
And of course a lot of social media attention for bwin.