Well, I don\'t know any sites with just easy songs but I can give you a few names of some decent file sharing sites and once there, you can serach for watever you need.
The best by far is Morpheus...www.morpheus.com
www.Kazaalite.com
Look also into \"Grokster\" and \"Limewire\". I don\'t know much about the last two but I hear some people have those programs and they like them.
enjoy!