Queen is the first classic artist to topped the 2 million in iTunes digital sales. Only eleven songs that were released prior to the opening of the iTunes store in April 2003 have topped 2 million. Awesome!!

In chronological order, they are:

1) Bohemian Rhapsody
2) We Will Rock You
3) Don't Stop Believin
4) Eye Of The Tiger
5) Billie Jean

etc..

http://new.music.yahoo.com/blogs/chart_watch/73001/chart-watch-extra-thank-you-daniel-powter/