Berryz Koubou, C-ute and S/mileage will all be performing at Odaiba 2011 Live Event.
I didn’t see/hear about last year’s event so I’m not sure what the performances were like but I like seeing H!P groups perform together and I’m hoping for some sort of medley between the three groups. That may be hoping for too much but hopefully they’ll all perform one song together.
They also said last year Buono! was included in the lineup and even though it doesn’t list Buono! this year I hope they do make a surprise performance or something since Momo, Miya and Airi will already be there.
More details on the event will be announced later so hopefully they can add Buono! there. Other than that the event is set to take place sometime during Summer.