EXPIRED!
UPDATE: 5/24 Today is the last day to redeem and earn these credits!!
Yay! More free MP3 credits to get free songs! Simply enter your favorite song and share it via Facebook to score a FREE $2 credit (automatically added to your account) valid for any MP3 purchase in the Amazon MP3 store! Credits must be redeemed by 11:59 PM EST on May 24th.