Oh my god this is so creepy. Just go to the official video of this performance. Shortly before the background voices come in, she is too sad to sing on. Here she just sings "heaven couldn't wait for you" just fine directly before the voices come in. I don't know it's so creepy
How come she can't? It sounds good to me and your comment is hate because you said it rudely. She did Whitney justice with this it don't have to sound the same