Luke Bryan fans left a huge mess after the concert at Heinz Field in Pittsburgh on Saturday night. Mayor Bill Peduto is calling for Luke Bryan's concert promoters to clean-up . He says, "We've worked too hard to build the quality of life in Pittsburgh to let others get away with destroying it. My administration will investigate further ways to hold promoters more accountable for these costs and impacts, while recognizing the economic benefit such large events bring to our publicly owned facilities."