Apple's iTunes Music Store today launched "Countdown to 10 Billion Songs," and is planning to give away a $10,000 iTunes gift card to the customer who buys the song that puts that turns the counter to eleven digits.
In addition to announcing the give-away, iTunes released a list of its all-time best selling songs, making that information available for the first time ever. Black Eyed Peas' "I Gotta Feeling" is Apple's most downloaded song, and its "Boom Boom Pow" holds the No. 3 spot. Lady Gaga also hold two of the top ten spots with "Poker Face" and "Just Dance." Other artists in the top ten include Jason Mraz, Coldplay, Flo Rida, Taylor Swift, Leona Lewis, Ke$ha and Pink.
The complete list of the Top 25 best selling iTunes songs of all time, and full details about the giveaway can be found on the store's "Countdown" page.