what song takes you back and always sends a shiver down your spine. For me its comfortably numb (pink floyd) for pure taking me back, and also down to the waterline (dire straits).
Kathys Song (Simon and Garfunkel), still in love with you (thin lizzy) make me sad, and the saddest one ever, for me is You my love, by chris rea. And Sara, Fleetwood Mac