It might help if your friend could provide more information.

What type of song was it? (Ballad, love song, song about the sea, etc)
What type of music was it? (Rock, folk, a capella, etc)
When did your friend hear it? (Year, decade, etc)
Where did your friend hear it? (Radio, record, club, etc)

The lyrics as put here are no help as you well know.

Thank you.