Old musical about two sisters
I am trying to find name of old musical about two sisters. One is blond and the other dark hair. Their blond girl is beautiful and is on stage but then doesn't want to be any more so their mother makes the dark haired girl go instead but makes here wear a blond wig. There is a song later in the movie between the dark haired girl and the three stripers. Please help it has been driving me crazy for about a year. I remember the dark haired girl in one scene says something like 'look I am beautiful' because she realises that she is not the ugly sister after all.
