Music : Katy Perry/Lukasz Gottwald/Max Martin
You change your mind
Like a girl changes clothes
Yeah you PMS
Like a b***h
I would know
And you over think
Always speak
Crypticly
I should know
That you're no good for me
Cause you're hot then you're cold
You're yes then you're no
You're in then you're out
You're up then you're down
You're wrong when it's right
It's black and it's white
We fight we break up
We kiss we make up
（you）You don't really want to stay no
（but you）But you don't really want to go-o
You're hot then you're cold
You're yes then you're no
You're in and you're out
You're up and you're down
We used to be
Just like twins
So in sync
The same energy
Now's a dead battery
Used to laugh bout nothing
Now your plain boring
I should know that
You're not gonna change
Cause you're hot then you're cold
You're yes then you're no
You're in then you're out
You're up then you're down
You're wrong when it's right
It's black and it's white
We fight we break up
We kiss we make up
（you）You don't really want to stay no
（but you）But you don't really want to go-o
You're hot then you're cold
You're yes then you're no
You're in then you're out
You're up and you're down
We used to be
Just like twins
So in sync
The same energy
Now's a dead battery