Blue Tango by Leroy Anderson is in D at 95 beats per minute and runs 1:41 across 32 bars. It uses 7 chords — D, A7, G, Gm, Em7, Ebdim7, D7. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? Blue Tango guitar melody tab.