Although I don't know that there is a movie in the United States where an ugly woman finally becomes the editor-in-chief of a fashion magazine, I know that another movie is similar. The ugly woman goes for plastic surgery for the man she likes and becomes a beautiful woman. Because the ugly girl is ugly, but she sings well, so she once lip-synched for a singer. The name is "Ugly Woman Turn Over", also called "Beauty's Trouble".

Although it's not what you want, I'm sorry, but I hope you like it.