Released: September 15, 2004

Songwriter: Andreas Carlsson Desmond Child Charlie Midnight

Producer: Andre Recke Andreas Carlsson Desmond Child Charlie Midnight

[Verse 1]
There were places we would go at midnight
There were secrets that nobody else would know
There's a reason, but I don't know why
I don't know why
I don't know why
I thought they all belonged to me

[Chorus]
Who's that girl?
Where's she from?
No, she can't be the one that you want
That has stolen my world
It's not real, it's not right
It's my day, it's my night
By the way, who's that girl living my life?
Oh no, living my life

[Verse 2]
Seems like everything's the same around me
Then I look again and everything has changed
I'm not dreaming, so I don't know why
I don't know why
I don't know why
She's everywhere I wanna be

[Chorus]
Who's that girl?
Where's she from?
No, she can't be the one that you want
That has stolen my world
It's not real, it's not right
It's my day, it's my night
By the way, who's that girl living my life?
Oh no, living my life

[Bridge]
I'm the one who made you laugh
Who made you feel and made you sad
I'm not sorry for what we did, for who we were
I'm not sorry, I'm not her

[Chorus]
Who's that girl?
Where's she from?
No, she can't be the one that you want
That has stolen my world
It's not real, it's not right
It's my day, it's my night
By the way, who's that girl living my life?
Oh no, living my life

Hilary Duff

Hilary Erhard Duff (born September 28, 1987) is an American actress and singer. Duff began her acting career at a young age, and quickly became labeled a teen idol.

Upon signing with Hollywood Records, Duff began working on the album, Metamorphosis (2003). The album achieved critical and commercial success, topping the Billboard 200 and selling over three million copies in the United States alone. Duff began to expand her career into theatrical films.She continued to have success in music, with her albums Hilary Duff (2004) and Most Wanted (2005) achieving Platinum status in the United States. Following the release of her fourth studio album, Dignity (2007), Duff released a greatest hits album (2008) and parted ways with Hollywood Records. She returned to music in 2014, and signed with RCA Records for her fifth album, Breathe In. Breathe Out. (2015).

Duff has worked with numerous charities and organizations throughout her career.