《It Will Rain》作为《暮光之城4：破晓》的主题曲，在美国Billboard榜单上的名次一路飙升，在榜10周，蝉联2周季军。不同于电影中另一首电影插曲《A Thousand Years》的温情，这首歌，用“火星哥”自己的话来说，“想表达的是爱情的黑暗面”。
"If I lose you, there'll be no sunlight, there'll be no clear skies."阳光和天空都不在眼中，良辰好景虚设。没有你的日子，还有谁能体谅我的雨天。

Song：It Will Rain
Artist：Bruno Mars
If you ever leave me, baby
Leave some morphine at my door
'Cause it would take a whole lot of medication
To realize what we used to have
We don't have it anymore

There's no religion that could save me
No matter how long my knees are on the floor
So keep in mind all the sacrifices I'm making
Will keep you by my side
and keep you from walking out the door

Cause there'll be no sunlight
if I lose you, baby
There'll be no clear skies
if I lose you, baby
Just let the clouds
My eyes will do the same
if you walk away
Everyday it will rain, rain, rain

I'll never be your mother's favorite
Your daddy can't even look me in the eye
Oooh if I was in their shoes, I'd be doing the same thing
Saying there goes my little girl
walking with that troublesome guy

But they're just afraid of something they can't understand
Oooh but little darling watch me change their minds
Yea for you I'll try I'll try I'll try
I'll pick up these broken pieces till I'm bleeding
That'll make you mine

Cause there'll be no sunlight
if I lose you, baby
There'll be no clear skies
if I lose you, baby
Just like the clouds
My eyes will do the same
if you walk away
Everyday it will rain, rain, rain

Don't just say goodbye
don't just say goodbye
I'll pick up these broken pieces till I'm bleeding
That'll make it right

Cause there'll be no sunlight
if I lose you, baby
There'll be no clear skies
if I lose you, baby
Just like the clouds
My eyes will do the same
if you walk away
Everyday  it will rain