For this week's "YouTube clip for a peaceful weekend," I've picked Leonard Cohen's 1984 song "Hallelujah." It's been covered by several vocalists and heard in a few movies and TV shows (usually during a sad moment that achieves resolution of some sort).
"Hallelujah" picked up new steam after being heard this season on American Idol.
I think my favorite vocal on the song is done by Rufus Wainwright.
I also like the the Allison Crowe version: