2011年1月22日，Willow在她的脸谱主页上公开了这首歌16秒的试听版。21st Century Girl（21世纪女孩）是一首节奏比较强劲的舞曲，由瑞典籍製作团队Twin製作。

2011年2月28日，Willow 在奥普拉脱口秀中完整地演绎了这首歌。

2011年3月1日，这首歌在iTunes发行。

Willow Smith - 21st Century Girl

Give me an inch

I promise I'll take a mile

Danger is beauty

I'll face it with a smile

I'm on a mission

With no restrictions

Don't second guess myself

I'm born to be wild

I'm the type of chick

That likes to rock the beat

I like to rock the beat

I like to rock, to rock the beat

21st Century Girl

I do what I like

21st Century Girl

I’m taking you for a ride

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

21st Century Girl

A beautiful life

21st Century Girl

Us walking side by side

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

Step on the breaks

Then I'mma step on the gas

I am a rebel

But I do it with class

I set the boundaries

The rules don't own me

I'm living life on the edge,

I choose my path

I'm the type of chick

That likes to rock the beat

I like to rock the beat

I like to rock, to rock the beat

I'm the kind of chick

That knocks you off your feet

That knocks you off your feet

That knocks you off, off your feet

21st Century Girl

I do what I like

21st Century Girl

I’m taking you for a ride

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

21st Century Girl

A beautiful life

21st Century Girl

Us walking side by side

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

I feel like I can take over the world

If only I get my dreams out

Pull gold from my soul

Pull diamonds from my heart

It's that new girl thinking and this song is just the start!

21st Century Girl

I do what I like

21st Century Girl

I’m taking you for a ride

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

21st Century Girl

A beautiful life

21st Century Girl

Us walking side by side

21st Century Girl

Yeah, I'm gonna live it up

Just live it up

21st Century Girl~~