There is no clear evidence that Melanie Martinez underwent plastic surgery or any other cosmetic procedures to change her face. However, there are rumors circulating on social media that she spent over a million dollars on plastic surgery to change her entire face. These rumors are not confirmed and should be taken with a grain of salt.

Melanie Martinezs new, otherworldly look is due to prosthetics that she wears for her performances. She has talked about the process of getting the prosthetics on, saying that she puts new prosthetics on every time and it takes 2-3 hours for her face to put 4 prosthetics.

In conclusion, there is no evidence to suggest that Melanie Martinez underwent plastic surgery or any other cosmetic procedures to change her face. Her new look is due to prosthetics that she wears for her performances.