Katy Perry announced two days ago the opening acts for her Witness Tour via instagram. The acts include Noah Cyrus,Purity Ring and Carly Rae Jepsen. As well as announcing the opening acts, Katy also shared some news that the tour will be postponed “due to unavoidable production delays” and will start on 9/19 as opposed to the original date of 9/09. Check below to see the announcements.