So you might wonder, what was the 25 billionth song? Phillip Leupke, a 22 year-old student from Hanover, Germany downloaded "Monkey Drums (Goksel Vancin Remix)" by British DJ Chase Buch. (Yeah, I've never heard of it either. I couldn't even find it on YouTube.) Because he was the 25 billionth download he also won 10,000 Euro's worth of future downloads. That's over $13,000 here in the US.
There are even more interesting facts about the download here.
12:09PM February 7, 2013