Katy Perry kicked off Labor Day weekend by announcing that her official video for "Roar" will arrive on Sept. 5. Perry tweeted the news along with a poster for the event. The "Roar" video will be of the "motion theory adventure" variety, and it was apparently filmed in "Junglescope." Perry's new album, "Prism," is out on Oct. 22.
— Katy Perry (@katyperry) August 30, 2013