Perry tweeted that the track will be out on iTunes at midnight ET. "Looks like there's a tiger on the loose!!!" she wrote.
"Prism," Perry's fourth studio album, is due out Oct. 22.
Roar
Katy Perry
I used to bite my tongue and hold my breath
Scared to rock the boat and make a mess
So I sat quietly, agreed politely
I guess that I forgot I had a choice
I let you push me past the breaking point
I stood for nothing
So I fell for everything
You held me down, but I got up
Already brushing off the dust
You hear my voice, you hear that sound
Like thunder, gonna shake the ground
You held me down, but I got up
Get ready ’cause I’ve had enough
I see it all, I see it now
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar
Now I’m floating like a buterfly
Stinging like a bee, I earned my stripes
I went from zero
To my own hero
You held me down, but I got up
Already brushing off the dust
You hear my voice, your hear that sound
Like thunder, gonna shake the ground
You held me down, but I got up
Get ready ’cause I’ve had enough
I see it all, I see it now
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar
Roar-or, roar-or, roar-or
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar
Katy Perry
I used to bite my tongue and hold my breath
Scared to rock the boat and make a mess
So I sat quietly, agreed politely
I guess that I forgot I had a choice
I let you push me past the breaking point
I stood for nothing
So I fell for everything
You held me down, but I got up
Already brushing off the dust
You hear my voice, you hear that sound
Like thunder, gonna shake the ground
You held me down, but I got up
Get ready ’cause I’ve had enough
I see it all, I see it now
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar
Now I’m floating like a buterfly
Stinging like a bee, I earned my stripes
I went from zero
To my own hero
You held me down, but I got up
Already brushing off the dust
You hear my voice, your hear that sound
Like thunder, gonna shake the ground
You held me down, but I got up
Get ready ’cause I’ve had enough
I see it all, I see it now
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar
Roar-or, roar-or, roar-or
I got the eye of the tiger,
a fire, dancing through the fire
‘Cause I am a champion and you’re gonna hear me roar
Louder, louder than a lion
‘Cause I am a champion and you’re gonna hear me roar
Oh oh oh oh oh oh...
You’re gonna hear me roar