Try using the Google music hack:
Write this into a google search:
You only need add the name of the song/artist/singer.
Example: ?intitle:index.of? mp3 nirvana
It works well with more popular bands/artists. Here's another example:
?intitle:index.of? mp3 jack johnson taylor
the first link you get has the song and some other jack johnson songs. Try it out for yourself