俞灏明唱的up down girl原版是什么歌?

http://www.awyy.net/6/C07BF54D/A0207046/79B1599E/

原唱west life 西城男孩

She's been living in her uptown world
I bet she never had a back street guy
I bet her mama never told her why

I'm gonna try for an uptown girl
She's been living in her white bread world
As long as anyone with hot blood can
And now she's looking for a downtown man
That's what I am

And when she knows what
She wants from her time
And when she wakes up
And makes up her mind

She'll see I'm not so tough
Just because
I'm in love with an uptown girl
You know I've seen her in her uptown world
She's getting tired of her high class toys
And all her presents from her uptown boys
She's got a choice

Uptown girl
You know I