What's the URL to the free song from Kelloggs at Walmart.com?

[JuryDuty]

I recently ate a box of Raisin Bran and got a code for a free song from Walmart in it. Unfortunatly, after finishing the cereal, I tore the code off the box and threw the box away...not realizing there was a unique URL where I'm supposed to enter the code. Anyone know what it is? I thought it was something like walmart.com/kelloggs or something, but that doesn't work...

TIA!