Watch the official trailer for KATY PERRY: WILL YOU BE MY WITNESS?, a YouTube Red Original Movie. Premieres October 4!
In her new YouTube Red Original Movie, the colorful pop icon puts her life on camera 24/7 for four whole days, in her most intimate reveal yet. Join Katy as she does behind-the-scenes in the creation and aftermath of this unprecedented live-streaming event with friends, artists and celebrity guests.
YouTube Red Originals - http://youtube.com/Red. If you live outside the United States, Mexico, New Zealand, Australia or South Korea, click here for more details on availability in your country: https://goo.gl/UEojxv.