Pirating MP3s directly won't work because of a recent lawsuit that abolished it from limewire, MP3 Rocket, etc. Go to youtube.com, find the song you want, and convert it with an online converter.
I use Frostwire for hard to find music that has been deleted from Music companies archives. The other is Bandit.fm, this is the official Sony Entertainment download site, wher you can purchase tracks or albums, tracks start at $0.50 AUD, pending on poularity.
please put best answer because Frostwire is the newer more secure version of Limewire here *http://www.google.com/url?sa=t&source=web&cd=2&ved=0CEUQ0gIoADAB&url=http%3A%2F%2Fwww.frostwire.com%2F%3Fid%3Ddownloads&ei=XI9ITuyGAebm0QG22MX0Bw&usg=AFQjCNERvsVMq2ewFcT1J6o3dtxIOdKXRw
By the way I use this and it still has same controls as limewire way faster those i now get turboboost connections