do you have to be liza mu nella? ays say, to do this show, i think all of us have to get in touch with our inner liza, with our inner diva because the material, they really, their material is very special and sparkly and grand and you really can't go out there unsure of yourself. you have to really have guts to get out there and take center stage and sell it. >> tell me about boom diddy boom. >> this is actually one of the more inventive moments of the show. a song from the show called "'70 girl" and our musical stager has taken this. it's one lyric in the song and it's repeated over and over -- >> for about six minutes. >> what she's done is created the story of these three couples and seligy we go through the course of a relationship from a meeting to a breakup to a marriage to -- it's really, really fun. the audience loves it. >> there's so many other numbers we do in the show and that's the one that always sticks out. >> is there a story behind it? i know there's wonderful music in the show, but is there a story,