Ilsy Juber. She was great and that guitar solo and All Along the Watchtower cover made it even better, plus she kind of looked like Melisandre with that red clothing on her.
I would like to add that the rap from Until It Breaks during Waiting For The End was epic. I'm not sure it was a new element, but I don't remember Mike doing it before. The delivery of "are you in the firing squad or are you in the lineup" was so great.
That's because a lot of Chester's studio vocals WERE on playback on Rebellion. Ilsey and Jeremy killed it. Jon Green was also MVP of the show in my opinion, he did keys/guitar/backup vox on like 6 more songs in addition to his two guest songs.
Jon Green fits in naturally kind of since he’s able to switch between a lot of roles and can sing well. Just don’t know if he can pull off the rock and metal side of LP
I fucking loved when Ilsey Juber sang "Sharp Edges". Though "The Catalyst" with Deryck surprised me the most, damn could he sing that song.