It seemed to work a second later. I think it might have supposed to have been a different girl... and you could see a stagehand in black for a second run across the stage, presumably gave whichever girl a new mic. Airi's hair is beautiful.
Also, thought I'd mention, for those not watching it... as compared to the uStream live, which was one camera angle, this one is multi-angle, like a DVD release would be.