Normally I don't share freebies here, but this is a good one. Right now, you can get a $2.00 Amazon credit good for any MP3. Since most of their best sellers are just 99 cents, you could get 2 free songs.
To redeem the code, just click here. In the green box at the right side, there will be a link to redeem your gift codes. Just enter GIVEMP3S as the code and it will credit your account. By the way, the song I linked to is free to download as well. It's Joseph's Lullaby by Mercy Me. It's one of my favorites! It's a beautiful Christmas song and definitely worth adding to your MP3 collection.