DESCRIPTION:
As of 7/29/19 Dr. Luke lost the lawsuit for stealing the Dark Horse riff: https://www.thesun.co.uk/news/9538210/katy-perry-courtroom-laughing-perform-live-trial-stealing-song/
UPDATE: Dr. Luke steals again! :
https://youtu.be/alsjfxFzgSw
Wide Awake Stolen: https://youtu.be/JjpFwiDmBA4
Dr Luke Masterclass: https://www.youtube.com/watch?v=xhJVpnhJefg&ab_channel=WillLoomis