The best things in life are for free. Well, except when it comes to free music. Free download sites like Kazaa and Limewire prove free songs, but you might get unwanted surprises as well. For instance, you might receive spyware and viruses with your download.
Also, the download is at your risk so that it might not be even the song you want. Note that this free audio is shared from other computer users so the integrity of your files are as good as your neighbor down the block.
Try to stick with iTunes or borrowing music legally from friends. This way, you will receive your songs free of unwanted spyware, viruses, and incorrect information.