Answers: Frostwire, Limewire, Bearshare OR if you don't want to use software, Mp3 Raid and Mp3 Center. Or EMp3 World.
If this isn't OK, try googling, free music downloads, free mp3 or mp3 downloads.
Hi Chris try these
http://www.extratorrent.com
http://www.scrapetorrent.com
This is surely the easiest method to download music/movies that I've ever see .
Straight to the point, no annoying ad or popup...I love it! Check it out yourself
http://www.flickrmusic.com