'Brick By Brick' hitmaker Katy Perry's popped a 'Prism' teaser video thing online.
The clip lasts all of seven seconds and features someone — who might be Katy herself — sporting some purple overalls and pushing a trolley of 'Prism' CDs in a shopping centre environment.
The person in question is also whistling the melody to 'Roar'.
You basically have no reason to watch it now, but here it is anyway.
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