I know this sounds like a ridick never possible software- But it really works. If you have a mic for your computer you can find pretty much every song just by putting your mic up to your speakers.
http://www.wildbits.com/tunatic/
There is a mac version aswell, and it dosent work for every song but a good 90% of them work. And make sure there is absolutely no other sound other than the music when using this.
Hope this is helpful to all of you!
Spence