You're like a junk email in my inbox
Keep coming back, you keep coming back
You're like a constant ringing in my ears
You keep calling back, why are you calling back?

You're like a train that's running out of steam, oh
You're losing track, should've stopped way back
You're with a new girl now, she's only 16
Hanging off a string, I heard her heart smash

So tell your girlfriend you used to be my boyfriend
Used to be my boyfriend, how would she like that
She doesn't know about all the things you've done then
All the things you've said, just to try and get me back
But you had your chance

Peroxide on your heart
It's burning, it's falling apart
Peroxide on my heart
It's turning light from the dye
Peroxide in your eyes
It's burning, burning your heart
Peroxide, you ask why
You ask why it all fell apart

She's one beautiful rose in a thorn field
She doesn't know that you're among those
She can only give so much until you take
Take yourself back and leave the pain

So tell your girlfriend you used to be my boyfriend
Used to be my boyfriend, how would she like that
She doesn't know about all the things you've done then
All the things you've said, just to try and get me back
But you had your chance

Peroxide on your heart
It's burning, it's falling apart
Peroxide on my heart
It's turning light from the dye
Peroxide in your eyes
It's burning, burning your heart
Peroxide, you ask why
You ask why it all fell apart

Let it burn 'cos it's your turn
To feel something now

Peroxide on your heart
It's burning, it's falling apart
Peroxide on my heart
It's turning light from the dye
Peroxide in your eyes
It's burning, burning your heart
Peroxide, you ask why
You ask why it all fell apart