ShowShowWitness: The Tour: CologneMay 23, 2018Katy Perry, Tove StyrkeLanxess Arena · Köln, GermanyFollowI was thereUpload from this showMediaLineupAboutDateMay 23, 2018VenueLanxess Arena · Köln, GermanyArtistsKaty Perry, Tove StyrkeListingConfirmedShow details from MusicBrainz.