Site for downloading songs :]

Hello,
can somebody tell me a site where I can download songs, coz I have a few which I search and can't find.
And if it's possible a site where there is and english menu so that I can understand.

Many Thanks in advance

if the songs are on youtube you can convert them into mp3 files on this site
http://www.zamzar.com/url/

I have a program for downloading songs from Youtube, but the songs that I am looking for are not on youtube...

But thanks for the reply.

Itunes and Amazon are easy to use...............and legal.
We can't really suggest any file-sharing sites for legal reasons.....google can though.

thanks