Holy crap, you guys really like your Rock Band. A press release, citing NPD figures, has confirmed the franchise has generated $1 billion dollars in retail sales in North America alone since its November 20, 2007 release. If you thought that was crazy (it really isn't, considering Guitar Hero already surpassed the $1 billion mark), know that wannabe rockers have downloaded over 40 million premium songs from the Rock Band store. We can't say we blame you, as there are some pretty great songs to choose from.
Sadly, the press release doesn't tell us what songs were most popular, nor does it tell us what platforms people were downloading the most songs on, but we have a feeling we know what will be the most downloaded song. You heard it here first, folks!