The most-popular songs at retail were also the most popular tracks being downloaded from file-sharing networks. The analysis of billions of file exchanges globally over a 12-month period found 5% of available songs accounted for 80% of traffic on peer-to-peer services, and the most popular songs were traded over 14 million times. The study also found that 13 million songs were traded at least once over the past year.
The most-popular songs at retail were also the most popular tracks
