Free Music Downloads For MP3 Players Legally?

Is there any great websites to download free music into your mp3 player legally? No paying a bill for months, just everything free to download and easy. I used to use a free music download site only stopped using it a few weeks ago. It was so easy to download free music from. I just got my mum a new mp3/mp4 player for the plane when we go on holiday and i was wondering if anyone knew the site.
Please let me know of legal sites for my player.

First, decide whether you want to get the music from Amazon or iTunes. If you would like to use Amazon MP3, make an account at http://amazon.com. For iTunes, download it from http://apple.com/itunes.

Although both of these sites nomrally charge you money for their music, there are sites that will offer free iTunes or Amazon gift cards for completing set offers, including surveys and tons of advertisements.

You could use an illegal and unsafe torrent like Limewire, Frostwire, etc, but there are much better, legal, and safe ways.

It depends on what phone you have. If your phone have a cable so that you can connect to the computer, you can just drop the mp3 files. Just make sure you drop it in the music folder. Some phone dose not play mp3 files and only ring tones. You have to find a program that will convert it in to the ringtone file.

You can get all the songs you want on fullsongs.net too