iTunes has become the second largest music retailer in the US selling its 4 billionth song. They are second only to the brick and mortar powerhouse of Wal-Mart.
Of course the major labels continue to look at alternatives to iTunes that will allow them to make more on music downloads.
iTunes leapfrogged over Best Buy and Target--which came in second and third, respectively, to iTunes' fourth place the last time the NPD Group conducted their music-buying survey--as paid downloading experienced an overall spike of 50% between 2006 and 2007.
Those downloads now make up 10% of all music sales, although unsurprisingly the rise in downloads didn't make up for the plunge experienced by CD tallies throughout the course of the year.