what was interesting in this event was, while big name singers like may'n is at Anime Expo (where its more well known in japan than this small event), the japanese idol they have here is a REALLY low budget, and is a truely:
F RANKED IDOL. (Cosfest is like a indie event with no sponsors, but that makes it very attractive for cosplayers)
http://ameblo.jp/chiroru-hoshino/ (her blog)
http://www.youtube.com/watch?v=eFC5mJx67VQ&feature=relatedhttp://www.youtube.com/watch?v=NFklM_qYxOE&feature=channelmy group given how wild were we (our country is seriously damn boring during concerts, so my group aims to give it some life with wotageis and calls), cheered for her, not knowing how small name she is, and dun even care whether the song sounds good or bad (from e video you can obviously tell shes not very seasoned).
Its only after I came home then did a search session, found out she only has 1 CD, has like super limited fans (her promotion video on nico has low views and flame comments).
She talked to me after we danced along her Seikan Hikou, and realised shes a net idol debut (she has uploaded dance videos on nico last time, but refuses to tell us her nick).
So yea it was fun doing this kind of stuff while e rest of the crowd were basically, dead. I encourage everyone else on this forum, when you are in a concert, to encourage this sort of culture as well
