In a Valentine promotional deal, send Amazon MP3 to your friends and get $2 off with Amazon promo code VDAYMP3S.
Find the MP3 album or song you want to give > Click the “Give album or song as a gift” button > personalize your MP3 gift > click the “Proceed to Checkout” button > On the checkout page, enter coupon code VDAYMP3S in the box labeled “Have any gift cards, gift certificates, or promotional claim codes?” and click the “Apply” button. Your $2 credit will be added. Click “Give song as a gift” button.
What I did was visit the Gift Card Center for Amazon MP3, where you can enter your gift card code. Typed VDAYMP3S and $2 Credit became instantly available.
Valid till February 14, 2011. Please note that Amazon MP3 downloads are currently only available to US customers.