Hey Guys! I pray someone can help me, been looking for it since I saw it back in 2006.

-All I can remember is it's kind of a duet with a man and woman - very mello.
-they're in a city at night and they're singing to each other from separate buildings
And the lights in all the skyscrapers are going all over the place as if someone is playing with them.

-I can sort of remember a couple lyrics... but it may only be close to the rhythm of the song: "I'm for you" "feeling blue" "when I'm with you" or "until i'm with you"