The last night of Summerfest, the Jonas Brothers hope to fill the Marcus Amphitheater. I'm not kidding when I say "hope to fill". Can the Jonas Brothers even fill half the venue? Are you freaking kidding me? The Jonas Brothers "perform" at Summerfest, and they aren't at a side stage? What is Summerfest thinking? Yes, they sold out the Rave, but that's what, 4000 tickets? The Marcus Amphitheater seats 23,000. Marcus Amphitheater tickets will be easy to come by on that night. What a poor way to end the Summerfest run.