You're probably thinking of Deborah Henson Conant. I don't know her website right off, but she gets the pedal harpists all twisted up.
I find that humorous songs work well with my harp, especially if I can manage them very seriously. Big hits lately have been "The Lonely Shepherd", "Blood on the Saddle", and "Friggin' in the Riggin" (done as a sing-a-long on the chorus.
I think it's an issue of emphasizing the incongruity of most peopl's image of the harp.