HEAVENLY STEALS: Free $1 Amazon MP3 Credit

Update: Still available if you didn't get this. This is the same promo from back in February, if you got it already you can't get it again on the same account

Free $1 Amazon MP3 Credit

Click here
"Buy" Any FREE app listed on the page.
After you purchase there is no mention of the free credit. They will send you an email letting you know you got the credit and it will be automatically applied to your balance
To see your Amazon Credits balances click here. It will show you all balances, not only MP3