Own THE PRISMATIC WORLD TOUR LIVE on DVD and Blu-ray from October 30th, featuring the entire concert plus an additional thirty minutes of behind-the-scenes extras. Also available as a Digital Download. See it in PRISM-Vision, just like the audience saw it live! Order now: http://katyperry.com/PWTL Get “Roar” from Prism: http://katy.to/prism Katy Perry Complete Collection on Spotify: http://katy.to/SpotifyCompleteYD Katy Perry Essentials on Apple Music: http://katy.to/AMEssentialsYD Watch your favorite Katy videos on YouTube: http://katy.to/MusicVideosYD Follow Katy Perry: Website: http://katy.to/WebsiteYD Instagram: http://katy.to/InstagramYD Twitter: http://katy.to/TwitterYD Facebook: http://katy.to/FacebookYD Music video by Katy Perry performing Roar. (C) 2015 Perry Productions LLC, exclusively licensed to Eagle Rock Entertainment Ltd. http://vevo.ly/vbU5pw