This is a simple song, gonna write it for a friend
My shirt is inside out, I'm messy with the pen
He met Margaret on our rooftop, she was wearing white
And he was like, "I might be in trouble"
He had flashes of the good life
He was like, "Should I jump off this building now or do it on the double?"

'Cause, baby, if your love is in trouble
Baby, if your love is in trouble
Baby, if your love is in trouble

When you know, you know
When you know, you know
It kinda makes me laugh, runnin' down that path
When you're good, it's gold
'Cause when you know, you know

Word to all my friends
But they're red flags, they're white knights
They're black eyes and they're blue lies
If you're asking yourself, "How do you know?"
Then that's your answer, the answer is no
You gotta run, gotta run, run, run, run like your head's on fire
Run away like your head is on fire

'Cause, baby, if your love is in trouble
Baby, if your love is in trouble
Baby, if your love is in trouble

When you know, you know
When you know, you know
It kinda makes me laugh, runnin' down that path
When you're good, it's gold
'Cause when you know, you know
And when you're old, you're old
Like Hollywood in me, the diamond on your ring
The soul that you bring to the table
One that makes me sing
In a minor key

'Cause when you know, you know
When you know, you know
So if you don't know, don't give up
'Cause you never know what the new day might bring

Maybe tomorrow you'll know
Maybe tomorrow you'll know
Maybe tomorrow you'll know
I mean, join the party
By the way
The party is December 18
Okay, let's waltz this out, 'cause

'Cause when you know, you know
And when you're old, you're old
Like Hollywood in me, that diamond on your ring
The soul that you bring to the table
One that makes me sing
In a minor key
Diamond on your ring
'Cause when you know, you know
When you know, you know

Copyright: Sony/ATV Music Publishing LLC, Universal Music Publishing Group
Writer(s): Elizabeth Woolridge Grant, Jack Michael Antonoff