I found this new pic of ayu during the encore part of her concert. I am not sure which one this one is since I can't read kanji, but it does look pretty recent.
There are more new pics on yahoo japan auction.
http://page7.auctions.yahoo.co.jp/jp/auction/g75991800
http://page10.auctions.yahoo.co.jp/jp/auction/m64270860
http://page8.auctions.yahoo.co.jp/jp/auction/h132605809
Edit: I know that the costume are the same thing. I am sorry for not pointing out why I post this pic. Reason : Ayu's hair style looks different in the encore part. It's the first time I see her put her hair up like that during the encore part of the concert.