Surprinsingly, although Ruby was my least favourite character until now (I guess that's Chika's place now) I really liked this episode. I didn't understand what Chika meant with "the other surprise" although I guess is that everyone was joining magically the performance, even if they didn't seem to have practised, and it didn't seem to matter if the choreography was initially thought for two people
Anyway, apart from that, probably most solid episode of the season