Event 'will blow America away' By RICHARD HUFF DAILY NEWS TV EDITOR What would Simon say? "Idol" hopefuls at tryouts in L.A. recently. "American Idol" executive producer Cecile Frot-Coutaz promises a big event midway through the coming season of the red-hot talent show - but she won't say what it is. "If there's one thing that makes 'American Idol' so big, it's a huge event," she told the Daily News. "Something we're working on is a big-event show, sometime in the middle of the season, something that will blow America away," she added. Hard to believe the folks behind "American...