In reply to Oh.

All she had to do was sing. When she tried to sing her voice was not there which means she purposefully planned to lip synch the performance last year and when a playback track was used instead of the lip synch version she was not prepared to sing live. That is nobody's fault but Mariah's. A professional performer could have easily tackled that by just singing the song live. The loud audience would have even helped the performer sing it. I do not have to be "understanding" of the nonsense excuses you are projecting but I am certainly aware that Mariah is to blame for last year's horrible performance. Ive seen Beyonce take a tumble fall on stage and keep on performing like professionals should do.