'Ain't No Mountain High Enough' (1966)
Ashford & Simpson
If you need me, call me/
No matter where you are/
No matter how far
Ashford and Simpson's much-covered Motown duet reminds us that no obstacle is too great.
Pictured from left: Nickolas Ashford and Valerie Simpson.
(Erin Baiano for The New York Times)