Amazon has free MP3′s from time to time.
I don’t know how long they remain free but I found them while redeeming some free MP3 credits.
Some of these songs are remakes but they sound pretty close to the original.
Amazon music can be downloaded onto the Amazon Cloud Player (where you can access it anywhere on a computer with Internet access or on your phone via the Amazon Cloud Player app) or download it onto your computer and play it on iTunes.
Remakes almost as good as the original