Which channel was the most subscribed on You Tube in these years 2006-2007-2008-2009-2010-2011?

The channel that has the most subscribers on YouTube in the years 2006, 2007, 2008, 2009, 2010, and 2011 is not stated. It is stated that the YouTube channel that has the most subscribers in the year 2013 is Smosh with 11,507,945 subscribers.