"Killing Me Softly" — Roberta Flack / Fugees (1973/1996) Lyric snippet: "Strumming my pain with his fingers…" Why: Smooth, intimate R&B ballad.

"When Doves Cry" — Prince (1984) Lyric snippet: "How can you just leave me standing?" Why: Distinctive, moody and rhythmic.

by Journey: A universal anthem that everyone knows by heart. "Sweet Caroline"

Minimal verses, massive chorus. The a cappella opening is terrifying on karaoke — most skip to “And I… will always love you.” Review: Expert-level. Lyrics are simple, but pitch is not.