Chinese C-drama--rom com dubbed in English--Diamond Lover--fat girl to beautiful woman--

https://www.youtube.com/watch?app=desktop&v=VPftFpIe2vw

Now if so much weight is lost--plastic surgery is necessary to remove the "excess skin"--but with clothes on it might not be noticeable--

In this movie the weight was lost by diet alone--but it's a movie.