It is sung by Ruthless Ruth, Rapunzel, the Captain of the Guard, and the living pub thugs, which expresses Ruth's life long dream to sing, but never had the courage to. After her passing, unless her song was sang by others, they would be trapped within The Snuggly Duckling forever, and Ruth's spirit would not be able to move onto the afterlife.
With some encouragement from Rapunzel, Ruth was able to fulfill her dream to sing, and convince everyone else to sing along, releasing everyone from the pub and allowing her spirit to be free.
Ruth: Since I was a lassie, Just a sweet young thing, All I truly longed to do Was make up songs to sing. Sure, my voice was rotten and had a pitchy twang, But I had dreams, and in my dreams This is what I sang.
Listen up, all you goons,
Listen up and hear my tunes. Every line, boys, is mine So listen up.
Ruth: How I yearned to sing it, Still, I was afraid. Guess I feared they'd call me weird And mock the songs I made. So I shut my PIE HOLE!!! And hid my work away.
Rapunzel: But you had dreams.
Ruth: And in my dreams, This is what I played.
Listen up, if you please.
Listen to my melodies.
Rapunzel: Folks she wrote every note,
Both: So listen up.
Ruth: I kept my song a secret, But carved it on this club, Waiting till the perfect moment came. At last, I worked the nerve up, And stood before the pub, I let one note come through my throat, And then I died of shame!