Question: It was this day in Rock History in 2009, these guys held a free concert in Hawaii to placate angry fans. Who was it?

Answer: It was Aerosmith! Fans filed a class action case, which claimed the band had canceled a sold-out show in Maui two years earlier, leaving hundreds of fans out of pocket in favor of a bigger gig in Chicago. Aerosmith agreed to put on a new show, and would pay all expenses. Everyone who bought a ticket to the original concert would receive a free ticket.