ShowShowWitness: The Tour: Grand RapidsDec 7, 2017Katy Perry, Purity RingVan Andel Arena · Grand Rapids, United StatesFollowI was thereUpload from this showMediaLineupAboutDateDec 7, 2017VenueVan Andel Arena · Grand Rapids, United StatesArtistsKaty Perry, Purity RingListingConfirmedShow details from MusicBrainz.