The Eminem diss track on Mariah and Nick Cannon is fantastic, but you can find it on your own pretty easily and it's a little blue for what I usually like to put on here. Why would anyone ever get him angry? People should have learned their lesson by now. Instead, let's kick the best diss track of all time. It's not Dr. Dre's "Dre Day" and it's not Jay-Z's "Takeover". In response to Neil Young's "Southern Man", Lynyrd Skynyrd wrote this song.