ShowShowWitness: The Tour: ChicagoOct 25, 2017Katy Perry, Noah CyrusUnited Center · Chicago, United StatesFollowI was thereUpload from this showMediaLineupAboutDateOct 25, 2017VenueUnited Center · Chicago, United StatesArtistsKaty Perry, Noah CyrusListingConfirmedShow details from MusicBrainz.