Are you an iTunes subscriber? If so, hurry up - downloader who bought 10 billionth track wins a $10,000 iTunes gift card.

The most-downloaded songs are:

* The Black Eye Peas "I Gotta Feeling"

* Lady Gaga "Poker Face"

* The Black Eye Peas "Boom Boom Pow"

Other acts with tracks in the top 25 include Coldplay, Kanye West, Taylor Swift, Katy Perry, Kings of Leon, the Fray and Owl City.