Where does it say she should? They're just speculating that she could be doing it. I hope to God this isn't true, because we all know she would not be able to pull it off since she does not have the performance talent. In addition, her being on tour doesn't mean anything since it's not like she would be able to use her touring stage. Artists have to have a custom stage that can be set up and taken down in under ten minutes, and Katy's tour stage probably takes a couple of hours.
Kii at them calling her safe and family-friendly, though.