On the following authorized websites you can find free legal iPhone-compatible music:

A default music store for your iPhone, it is not free in general, but can be used to download free songs each week as a bonus.

The paid service offers a trial of 25 free songs to download to iPhone.

Once famous free file sharing network, Napster is not free anymore. But it does have a free download section, where you can find some awesome tracks for your iPhone. Yahoo Music

Check out their free to download section and you may find some really nice free songs to download to iPhone.

The Web’s largest community of independent music and emerging talents, the site offers only free downloads.

A large free music source, the site features both all-time favorites and less popular music genres and bands.

If you are looking for some classic free songs to download to iPhone, most probably, you will find them here.

Top 10 Places to Find Free Songs to Download to IPhone