heres a solution, go on google and type firefox youtube downloader and use that to download a song from youtube. then get an audio converter, i recommend getting switch sound file converter because it converts MP4 video format to mp3. there you go you got a free song. some songs you can only find on youtube. as a bonus you can use it for getting video material.

Frostwire, limewire suck now because all the good stuff isnt there anymore. itunes may have the song but who wants to spend money