My favourite song of all-time, Tumbling Dice. Along with, among others, Can't Hardly Wait by the Replacements and Stroke It, Noel by Big Star. For more Stones, Let It Loose would have to be there too.
I'm going outside of the Stones for Gram Parsons' "In My Hour of Darkness" -- that song is for the people left behind. Once I'm gone, I'll be in heaven jamming to the Stones nightly.