Right now you can get $2 in free MP3 download credit from Amazon.
1. Go to the Gift Card Center for Amazon MP3
2. click the 'Enter Your Code' button
3. Enter promo code FALLMP3S
4. Download your free tunes.
$2 is enough to get a couple individual songs.
I do not know how long the code will work, but its undoubtedly a limited time offer.
You can also find various free MP3 downloads at Amazon.
For example Feels Like The First Time from Foreigner is free right now. There are a variety of other artists with free songs on Amazon so they're sure to have something you'd like. A lot of the free songs are from 'up and coming' artists (i.e. people you've never heard of) who are trying to get some exposure. However you can also often find free MP3s from well known established artists who are just giving away a freebie as a promotional deal.
I heard about this from Fatwallet.
This article may contain referral links which pay this site a commission for purchases made at the sites.