Uh, probably Life On Mars?, I don't know why, but it really means a lot to me... Also, Within You from Labyrinth, the first Bowie song that I actually knew was him (I'd heard Changes, Rebel Rebel, and Let's Dance before when I was young and didn't know anything about him except that he was a musician and had blonde hair), and his cover of My Death in the Ziggy movie is just so poignant, so much emotion in that...

I'll eat the sparkly bird poop cookies!!!
Dead bodies.
I'm proud of my piddle!
Uff da!