You knew Mos Def could rap, and act, and argue foreign affairs with Christopher Hitchens and Salman Rushdie. (Did you know that? If not, check this clip from Real Time With Bill Maher.) And did you know he could sing? Here he is giving tribute to Michael Jackson-something Rap Radar‘s Elliott Wilson notes is currently “Mandatory. End of story.”-on a cover of “Billie Jean.” He’s subtle in striking the iconic poses, and in his moonwalk, and he lets the crowd at Chicago’s House of Blues take the high parts. And there’s a real sadness in his reggae-tinged lilt. You can think of lots of way someone could do something like this, most of them not nearly this nice.