Social Media Champions League: Man United, Justin Bieber, Glee, MTV

If there were one giant global sports tournament, to be decided by how many fans a team has on Facebook, Manchester United (9.9 million fans) would lose a close, tense final match to FC Barcelona (10.3 million fans).But what if you decided the winner on how many of those Facebook fans are active – that is, the ones liking posts and making comments? Then Man United’s 256,000 active fans would run