The article of my info will be posted below this message.
http://www.gameinformer.com/b/news/archive/2012/01/23/the-best-selling-psn-games-of-2011.aspx
I think the fact that Call of Duty: Black Ops (being one of the best selling games on the PS3) having top spots on the DLC list is very reasonable, most know that Xbox Live does get Call of Duty updates before PSN. This means the people on PSN couldn't wait to get their hands on it. The other downloadable content is kind of unbelievable to be in the top ten, like seriously FIFA 12 packs. Then there is the digital game downloads and almost none of the games were actually from 2011, Tetris may be a classic but is it serious enough to top other digital games like the Mortal Kombat: Arcade Kollection that was a 2011 remake of the old Mortal Kombats. Even though the 2011 tops weren't 2011 tops we'll live a fine life.