However, someone who has undergone a lot of surgeries... 'Human Ken Doll' Rodrigo Alves', has issued Jack a warning, despite his denial.
Speaking to Daily Mail Australia, he said, "I don't encourage him to have any sort of injectables done."
Rodrigo contracted a deadly infection in 2014 from his surgeries that nearly killed him.
"Jack is talented and naturally good looking. My advice to him is to not get anything else injected because it will not enhance his natural features," he continued.
"It'll make his face puffy and have that 'pillow effect', speaking from my own experience. My advice to him is that he should concentrate on his music career and be happy."
Rodrigo warns Jack that the cosmetic changes may affect his music career if he continues down this path.
"He is a singer and should be known for his talents and not deviate the attention from this to his appearance," he said.
"It may change the dynamics of what he is trying to do - which is to sing."