Utahime videos!
There's some cool OG videos floating around; just thought I'd put 'em up.
Click to viewHanasaki Ririka, in her two-woman group "Fantasmagoric" sings live in Harajuku.
Mariho Erina has a nation-wide Shochiku commercial! http://www.shochu-kojika.jp/about/cm.html I can't embed it, but you can see it here.
Maikaze Rira singing live in 2011.
(Bonus for big fans: she now advertises "nyutaboseru," some sort of exercise clothing. The following link is mostly her schilling for the product, but there are some beautiful shots of her face, and doing ballet, so big fans might like it. Flowerballet, I'm looking at you! http://www.youtube.com/watch?v=Yj7CShmZknQ)