You would think in pure numbers that a city like Chicago would produce the most Hollywood-bound contestants on “American Idol.” But no. Two days yielded thirteen of them, and some of those were even questionable, at least in my eyes (and ears). Guest judge Shania Twain offered some comic relief at times, and some of the singers were no doubt talented, but I know we all expected more from the windy city. Here are the highlights and lowlights….