Witty, alluring performer whose offbeat charm and amiability landed her a gig as an MTV VJ. Duffy's (aka "Duff" on-air) less-than-serious approach to her job quickly made her a favorite to viewers. Unlike many of her predecessors who quickly fell into obscurity, she diversified into commercials and feature appearances. She made her feature debut playing a "Crack Den Girl" in the Christopher Walken actioner "McBain" (1991). Her subsequent feature credits include small roles in Spike Lee's "Malcolm X" (1991), "Who's the Man" (1993)--which also featured such MTV luminaries as Dennis Leary and Ed