Surely it says something about the quality of a performance when the middle finger of one’s sidekick gets more attention during the biggest gig of your career than you do. But even if Madonna’s Super Bowl set was a little … lackluster, there’s no doubting that she’s put on some of the most extravagant shows in pop history. And it’s a safe bet that when she brings the caravan ’round to KeyArena on Oct. 2 to promote her forthcoming record, MDNA, the show will be one of special magnificence. Even if nobody gives the crowd the bird.Tickets go on sale at 10 a.m. Monday via LiveNation.com.