@GhostofMatrix, I dunno why but I giggled a little when I saw all those 50 Cent and Lil Wayne songs. :[
I think the most powerful song I've heard is: Imagine by John Lennon The Times They Are a-Changin' by Bob Dylan Let it Be by The Beatles While My Guitar Gently Weeps by the Beatles My Heart Will Go On by Celine Dion Lucia Di Lammermoor by Inva Mulla A Little Light of Love by Eric Serra
Ooh, this is good for me. I've heard a lot of emotionally moving songs recently.
The Lightning Strike by Snow Patrol. I'm not providing a link to this one because there's no full song on Youtube. However, if you have 16 minutes to spare, then watch the 3 separate parts.
Transatlanticism by Death Cab for Cutie. I'm not sure about linking this, since it's blocked in my country, but it may work for you.
bone thugs crossroads akon lonely tupac they dont give a f*** about us sizzla things will get better jah cure sunny days cas haley walking on the moon...
honestly i can go on for much much much more longer than that