The first. The only. The song that brought christened me into the world of music.
Numb, by Linkin Park, off Meteora, their end-all, be-all best album, no matter how much I love Living Things and A Thousand Suns (and hell, Hybrid Theory and Minutes to Midnight. I love them all).
The Big Cheese, yes, him again, got me to listen to this song when I was quite young. I listened to it all the time in his trooper of a red Dodge Neon.
This needs no explanation. This song… is epic.