They definitely needed more rehearsal with the performance. It was clear Demi was not 100%...because she is usually stellar live. Christina, I thought sounded really good until she took the screaming too far...and she didnt give Demi room to really breathe on the song. They were very disconnected from each other....maybe the rumors of them having problems was true. Either way, I think this song deserves more performances and hopefully they can get it together.