Well, I don't know how it sounded at the stadium or on the TV, but I have managed to get a MP3 of the halftime performance, I dont know if it was recorded from TV or live at the stadium, but the sound is really disapointing.
It seems like the music was pre-recorded and actually it's only Jon and Richie singing live, like in a karaoke. Jon's voice sound very low, very far, but Richie's voice sound very near and very high, ant he just sings totally out of key.
I think that this could be one of the worst live performances I 've ever heard from the guys. I'm sure they had sound problems and that they couldn't heard themselves, cause Richie dont sing, he just screams