I don't know, but I think they probably didn't want introductions and talk. I'm not sure they could have gotten through it - it seems they barely got through the song, especially Jackson and Don. Plus, they obviously don't buy into the whole Grammy hoopla thing. It's my guess that they just wanted to keep it simple and straightforward, but obviously, I could be wrong.
It makes me really angry that people are ranking on Jackson. To me, the fact that he flubbed it a little just shows that he's human and that he cares about Glenn's death.
It may be me, but I didn't think you could hear Don's harmony as much as usual. It's normally so strong in the background. Timothy sounded great, but I don't think it quite made up for it. Or maybe they just wanted a quieter version. Not sure.
And it just seemed so sad without Glenn.
That picture of Don someone posted is heart breaking. He really looks devastated.