Blue concert ticket stub with barcode

I found a blue concert ticket stub yesterday around 3pm on the sidewalk outside the Waterloo Public Library, Main Street entrance. It's a glossy 2x4 inch paper ticket with a large barcode across the middle and a tiny holographic sticker in the top corner. The print is worn where the event name should be, but you can clearly see the date '08/12' and 'Section G, Row 4' on the stub. There's a faint coffee ring on the edge, and the ticket looks a bit crumpled from rain. It seems like it meant a lot to the owner, and I picked it up hoping to reunite it with whoever bought it. If this looks familiar, message me in the app or email me at [email protected].