I wouldn't be surprised one bit if this was all a very cleverly marketed set-up to make ratings and gobs of cash.
What I like, either way (surprise or engineered) is that the image of the person who is making with the wow is something distinctly against the grain of what is usually promoted by this banal crap.
For those who haven't seen the video, scope this:
The Daily Record dug up a copy of a charity CD she did in 99, where Susan did a cover of "Cry Me A River". A stream of the song is available in the preceeding link - a copy of the MP3 is here:
Mediafire - Susan Boyle - Cry Me A River