Answer:
I am terribly sorry to burst your bubble, but everything that downloads copyrighted music for free is illegal. The companies who make the software get away with it because they say that it is intended for uncopyrighted music. If you use it to download a copyrighted song, you are held responsible and can pay hundreds of thousands of dollars in fines. Not to mention, it could contain some viruses. I wouldn't recommend it. Stick with iTunes, AmazonMP3, eMusic, Napster, and Rhapsody.
-Hope this Helps!