ShowShowWitness: The Tour: UncasvilleSep 21, 2017Katy Perry, Noah CyrusMohegan Sun Arena · Uncasville, United StatesFollowI was thereUpload from this showMediaLineupAboutDateSep 21, 2017VenueMohegan Sun Arena · Uncasville, United StatesArtistsKaty Perry, Noah CyrusListingConfirmedShow details from MusicBrainz.