Websites that you can download free music on?

I have an iPhone and I downloaded the MP3 Music Downloader free and I only know one website that downloads songs, but sometimes if I try to download a song, it won't let me.

Try http://mp3skull.com/

Try 4shared.com

I have also iphone, iim using few sites like
songspk.pk
mp3skull.com
djmaza.com

and you can also search any movie's all songs on torrent.