Which concert.....
 

....had an ayu look-a-like come on stage?? I really want to see this.

hmmmm.. well, depends on exactly what you mean.

In the Concert Tour 2000 A there was an Ayu look-a-like for when she performed Monochrome and there were a bunch of people that were supposed to look like ayu when she performed, hhmmm.. Too Late I think it was.

I think those are the only two times where it happened during the performance. There is, of course, an Ayu look-a-like present for rehearsals and stuff so Ayu can see how it's gonna look, etc.

Ashley

theres one in [DOME TOUR] when shes riding the bike during [AUDIENCE], and many http://www.avexnet.or.jp/ayu/report/48/image/a.gifyu's during [Trust] in various colours, altho their faces dont match

Yeah, the Ayu double at DOME TOUR didn't really look like Ayu, she just has the same clothing and hairstyle, but you never got a good look at her face anyway. I think the double was wearing a motorcyle helmet during "AUDIENCE". I believe the double was also used at the end of "Fly high", when the marching band dudes lifted 'Ayu' on their shoulders.

Concert Tour 2000 A n Dome tour

huhuhu.... Hataro Minami :comfort :comfort :comfort by Ayu *make me jealous :D*

Doubles were also used during arena and stadium tours as well. In arena tour, between taskinlude and Naturally. Also between Free & Easy and evolution when she changes. In stadium tour, she was used at the beginning of Boys & Girls (the one wearing the mask). It's usually easy to notice, because she's usually always trying to cover her face as much as possible. The double she usuallys consistently now is Atsuko Kubota, I'm used to hearing her called Minori though.