This is an awesome performance. Particularly the last half, instrumental. Some of the best guitar work I've heard. (I wonder which part Bowie plays? I'm not sure if it's him singing.)
I admire David Bowie not just for his unique talent, but also for his relative ego-less-ness. He not only accepts, but encourages, people to rearrange his music and use it, and he always collaborates with other artist, and often complete on their terms. Very unusual for such a talent.