Hello guys! Recently I found out that Listerine is doing a special promotion with Disney: they offer the download of 2 Phineas and Ferb songs with the purchase of specially marked bottles of Phineas and Ferb Listerine Smart Rinse at Walmart. So, you enter the secret redemption code and the last four digits of the UPC to. Nothing special about this. But, through a retweet from Jeff "Swampy Marsh", I found out that the code "perry3519" works more than one time. So, I entered that code and was able to download the songs.
One of the songs included in the download is Dance Baby, and the other is a song called "Just Wanna See You Smile", apparently sung by Vincent Martella. Obviously it's related with Listerine and maybe it'll be part of an advertisement in the future (actually I don't know if it is right now because I don't live in the US). Anyway, if you want to listen to that song, it's already on YouTube.
PS: please forgive me if my english isn't good, it's not my native language