They´ve allways had these,very different songs,almost every album since 1968,and to be honest,many of those are underated classics.

Beggars Banquet:jig saw puzzle
Let it bleed:country honk
sticky fingers:sister morphine and moonlight mile
exile:i just want to see his face
goats head soup;can you hear the music
it´s only r´r:Fingerprint file
black n blue:Melody
some girls:Some girls
emotianal rescue:emotional rescue
Tattoo you:tops,heaven,ain´t no use crying
Undercover:Feel on baby
Dirty work:Too rude
Steel wheels:Continental drift
Voodoo lounge:moon is up
BTB:Might as well get juiced
a bigger bang:laugh i nearly died

SO if you have ONLY ONE song,which song would it be?

I have to go with:Fingerprint file or Continental drift

Might As Well Get Juiced.

If I had to choose from that list (and I love almost all of those songs and like all of them), I would have to go with the exquisite, timeless classic, "Moonlight Mile."