[Verse 1]
To live fast and die old,
What a perfect work of art.
To live with someone you love
And both get in bed before it's dark.
Life gets better, the hangovers get worse,
Oh, when did I get so old?
I even pay train fares now,
And most days, I do what I'm told.

[Pre-Chorus 1]
I wake up every morning with someone I truly love.
And every day, I act more like my mum.

[Chorus]
I watch what I eat.
I stay in and watch films.
Man, I have to pay my bills,
I must be grown up.
I'm working on my house.
I'm building a career.
How on earth did I get here?
I must be grown up.

[Verse 2]
I'm still someone's kid,
But I want to have my own.
I have less friends but more best friends,
And they're scattered around the globe.
I think about getting fit,
Like investing in my health,
And then I think of something else,
Like eating a pizza by myself.
[Pre-Chorus 2]
I wake up every morning with someone I truly love.
And it's scary how much I love my dog.

[Chorus]
I watch what I eat.
I stay in and watch films.
Man, I have to pay my bills,
I must be grown up.
I'm working on my house.
I'm building a career.
How on earth did I get here?
I must be grown up.

[Post-Chorus]
Woah, woah.
Woah, woah.
Woah, woah.
Grown up.
Woah, woah.
Woah, woah.
Woah, woah.
Grown up.

[Bridge]
We all miss school,
And most of us are married now.
Some people break their vows,
It's kinda weird how it all works out.
It's strange to know there's faces,
That I'll never see again.
Losing family, losing friends,
Each one is worse than the next.
[Pre-Chorus 3]
I wake up every morning with someone I truly love.
And the thought of losing them just cuts me up.

[Chorus X2]
I watch what I eat.
I stay in and watch films.
Man, I have to pay my bills,
I must be grown up.
I'm working on my house.
I'm building a career.
How on earth did I get here?
I must be grown up.