I'm thinking of a cover of this song that is quite famous in the french-speaking world, sung by a young man who was briefly a popstar.

He rose to fame after competing on a televised talent show. He sang a lot about overcoming, perseverance, and being yourself.

He sang, "The Show Must Go On" at a famous music festival in Paris and brought the house down. The standing ovation went on for over 10 minutes.

Gregory Lemarchal, the young artist in question, died a few weeks later of cystic fibrosis.

When he sang that number so powerfully, he knew he likely wouldn't live much longer. So did his fans and most of the audience who jumped to their feet for him.

I think he got the meaning of the song as well as you're describing right here. Thanks!