MacRumors.com

According to the article, Apple is up to 20 Million songs sold via the iTunes Music Store. (Apple was at 13 million songs as of October 16th.) Peter Lowe, Apple's Director of Marketing, also reported that 45% of songs from iTunes have been in the form of albums.

Some interesting statistics from the NPD Group showed that the average iTunes customer bought 49 songs during the first four months of the iTunes Music Store's operation, which comes out to twice the purchasing pattern of the average teenager over the same time period.