Digital album sales were up 50% from 2.6 million units in 2007 to 3.9 million units in 2008. The second most popular music format, after the CD, is the single download, with 44.6 million units sold in 2008. In 2008, Internet mail order, download shops and mobile music jointly accounted for 25.7% of all sales, up from 24.8% in 2007.
Digital album sales were up 50% from 2.6 million units in 2007 to 3.9
