Not sure if your thinking of "500 miles" by the Proclaimers, they are twin brothers.
The duo Bombshel sings it.
It was 1977-"Facts Of Life-Sometimes" hope this is the one you want.
Hanna-McEuen
RyanDan, A Canadian music writing duo.
Alejandro Sanz and Alicia Keys.
Josh Grobin and Celine Dion
I believe that's Brooks and Dunn
Likely the Civil Wars. They are a duo.
It's sung by a duo that goes by Pomplamoose.
The duo Band Pomplamoose
Hitler and anne frank
German duo called Night Bird