What is the name of the last song that Pimp C recorded???

I heard about it on the Rickey Smiley Morning Show. I think it is a Christmas song but I don't know how it goes or anything except that Bun B was on it too.

They say it might've been On Some Chrome w/Bun B and Three Six Mafia

The Ghetto with Too Short at a concert. I think he was a backup singer.

the last song he released was Free..

but i dont know what the last song he recorded was