Best Country or Rock and Roll song of all-time

I wanna know what you guys most favorite Country and or Rock & Roll tunes of all-time are. Myself, for country it would have to be "Song of the South" By Alabama, but for rock and roll it's a toss-up between "Freebird" by Lynard Skynard and "Hey You" by Pink Floyd.

By the way, my favorite bluegrass song is "Rocky Top" by The Osbourne Brothers.

If it's Rock And Roll, then anything by Cream, Hendrix, The Who, The Stones, the list goes on... I think it would unfair to brand one song "The Best Ever" because someone is always going to either disagree, or say another song which you hadn't thought of.