MasterCard offers four download credits to spend on a selection of downloadable MP3 Singles for free, via the directions below. That's among the best MP3 freebie deals we've seen recently, especially since most of these tracks cost 99 cents or more at the iTunes Music Store or Amazon. Be sure to scroll down to "Top Songs" to view the selection of MP3s that only cost one credit each. Note that having a MasterCard is not required. Credit expires on December 31. To get this deal:

1. Click here and enter your email address and code "Surprises"
2. you'll receive an email containing a unique pin code
3. click the coin found in the upper-right corner of this page
4. enter your pin code; you'll be prompted to create an account or log-in via facebook
5. you'll now have four free credits to spend on select tracks of your choice