沪江英乐：影片随着美国女歌手Vonda Shepard的《Someday We'll Be Together》拉开帷幕，欢快的音乐节奏配合生动活泼的卡通片头，预示着一部浪漫爱情轻喜剧的正式上演。据悉，Vonda Shepard还专门为《北京遇上西雅图》一片重新进录音棚录制了这首歌曲。

歌词：

A long time ago, my, my sweet thing
My love is yours, baby
You're far away, baby
Someday we'll be together
Someday we'll be together
(Oh, say it, say it, say it, say it again)
Someday we'll be together
You're far away, baby
From me my love, ooh yeah
And just as sure my, my baby
As there are stars above
Someday we'll be together
(Ah, yes we will, yes we will)
Someday, some sweet day
We'll be together
My love is yours, baby
Right from the start, oh yeah
You, you, you possess my soul now honey
I know, I know you own my heart
Someday, some sweet day
We'll be together
(Ah, yes we will, yes we will)
Someday, tell everybody
We'll be together
A long time ago, my, my sweet thing
I made a big mistake honey
I, said I, said goodbye
(Bye, bye, bye, bye)
(Baby, ever, ever)
(Ever, and ever, and ever)
Ever, since that day now
All I, all I wanna do
All I wanna do
I long for you
Every, every night
Ooh, just to kiss your sweet lips baby
Hold you ever, and ever so tight,
Someday, some sweet day
We'll be together
(Oh, yes we will, yes we will )
Someday we'll be together
(Oh I know, I know, I know, I know, I know)
Someday we'll be together
(Yes we will, yes we will)
Someday, some sweet day
Someday, some sweet day
Someday we'll be together
I long for you