"Saturday Night Live" piece from 1978 by Walter Williams ("The Mr. Bill Show").
UPDATE 7/09/09: From Time Online:
Michael Jackson would have turned 51 on Aug. 29, and the promoters of his planned This Is It tour are hoping to celebrate with a concert. It would take place in London and feature Jackson's rehearsal footage and appearances by members of his family. In other words, it would be a Michael Jackson concert -- with all the ingredients except the King of Pop himself.