I must say that Utada's This One (Crying Like a Child) has always "gotten" to me a lot. I think it's one of the most heart-felt and heart-wrenching songs I've ever heard. Especially the chorus, it's amazing the songs Utada produces.
I doubt I need to quote the lyrics, but I'll do it anyway :P

How could I ever love another?
How could you say you don't remember?
God knows I'd give anything
For just one more night together
Today I miss you more than ever
How could you say you don't remember?
This one's for the happiness
I'll be wishing you forever...

Simply amazing, I must say, I think I always tear up at the chorus.