User blog comment:Riyu-Hime/Ehhh???!!!/@comment-11059084-20130621172732/@comment-6092594-20130621194607

They were this Japanese Pop group that was produced by Konami. They were good but weren't really the most popular. They eventually disbanded because of lack of popularity of the 3rd generation.

And I didn't think anybody in H!P knew about them until I say Sayumi's profile.