Pollstar has listed it’s Mid-Year Top 100 Worldwide and North American Tours and Katy Perry can be found on both grossing 48.8 million (#14) and 19.6 million (#24), respectively. This ranking comes together by using gross ticket sales during the first six months of 2018. “Witness: The Tour” started in September 2017 and wraps up in New Zealand on August 21. Get tickets to see Katy in South Africa, Australia and New Zealand here.