I don't know if it seemed like this to anyone else, but the arrangement of the MM members + H!P members on the floor seemed like each girl was paired up with another that kinda was her "twin" from the other artists
The first song they did with everyone was...
Abe - Kusumi
Aya - Taka
Goto - Reina
Rika - Eri
Yossi - Risa
Erika - Shige
Yui - Aika
Kei - Linlin
Kaori - Junjun
Some of them are kinda weird, but basically all but the last two I can relate between the members, and it's weird! The same goes for the Reina/Koharu performance with Berryz/C-ute backup dancing
Erika - Captain
Maimi - Momo
Saki - Maasa
Kanna - Yurina
Maimai - Chinami
Airi - Risako
Maybe it's just me! Ahahaha! There were others, too