Today's the last day for the concerts unless they decide to extend it after maintenance. Here's the final day schedule:
9:30AM(PDT) | 12:30PM(ADT) P5 Concert, 8:30PM(PDT) |11:30PM(ADT) P3 Concert
There was one time where I didn't participate in the minigame so I was able to see the crowd spawn Elizabeth on the stage in the last parts of the song. I feel like everyone would have a much better chance at it in much smaller crowds, especially if people with bad connections try to join in with a large crowd. I wonder how many people actually managed to get more than two characters to dance on stage, which is simply the main character dancing and only one of their friends will show up.