The Inevitable Rise and Liberation of NiggyTardust!
I find it really disturbing that Trent Reznor has such a similar voice to Saul Williams. It's not identical, but there are a lot of similarities in tone and pronunciation - such that I find it really hard to differentiate the two.
This is made a lot stranger by the fact that Reznor is a white, industrial rocker while Saul Williams is a black hip-hop artist.
If you don't know, Trent Reznor has worked closely with Williams in order to produce the free album "The Inevitable Rise and Liberation of NiggyTardust!" He produced the album, arranged the music, and did backup vocals for several songs.
It's a really interesting and intelligent album, so download it here: www.niggytardust.com