The impending battle of the Davids put a little spring in American Idol's flagging step last night. Fox's hit show—which, despite showing signs of deflation, still exhibits juggernaut behavior—attracted nearly 24.3 million viewers Wednesday, a 1.4 million-strong bump from last week and its largest audience since April 2, when Michael Johns and Carly Smithson were still singing for their supper and little Ramiele Malubay got the boot.