10 billion songs have been downloaded from iTunes

"Apple® today announced that music fans have purchased and downloaded over 10 billion songs from the iTunes® Store (www.itunes.com), the world’s most popular online music, TV and movie store. The 10 billionth song, “Guess Things Happen That Way” by Johnny Cash, was purchased by Louie Sulcer of Woodstock, Georgia. As the winner of the iTunes Countdown to 10 Billion Songs, Louie will receive a $10,000 iTunes Gift Card. iTunes is the number one music retailer in the world and features the world’s largest music catalog with over 12 million songs."
Source: Apple press release, 25th March 2010
Previously - 8 billion downloads reported on 23rd July 2009