Released: February 28, 2006

Songwriter: Kara DioGuardi Greg Wells

Producer: Greg Wells

[Verse 1]
Who can make you mad when you're having a blast?
I can, I can
And who can pick you up when you feeling like you stuck?
I can, I can
And who knows what you think about, you silly little thing?
I do, I do
Who had you figured out and never had a doubt?
I did, I did

[Chorus]
Haven't you heard I'm supergirl?
You don't wanna mess with me
I got your back
I know your every move
And I got everything you'll ever need

[Verse 2]
I can make you hang on every single word
Like this, like this
It could be my vibe
Maybe it's my mind
Could be my kiss, could be my kiss
But when I'm around you, there's nothing I can do
I'm at my best, I'm at my best
Well, maybe I'm so good 'cause your standing in the room
You wish, you wish

[Chorus]
Haven't you heard I'm supergirl?
You don't wanna mess with me
I got your back
I know your every move
And I got everything you'll ever need

[Bridge]
I'll take your headache away
If you want another day
I'll be the reason that you live
I'll show you what you've always missed

[Chorus]
Haven't you heard I'm supergirl?
You don't wanna mess with me
I got your back
I know your every move
And I got everything you'll ever need
I'm supergirl
I got your back
I know your every move
And I got everything you'll ever need

[Outro]
I got everything

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.