"I think it’s best to do whatever makes you feel good … That’s the thing with me over the years I’ve been looking for my identity. I’ve been trying to find myself again and I’ve definitely experimented with filler and whatever, and there’s no denying that. I think it’s pretty obvious."
However, Jack denied ever having surgery.
"To me, lip filler is like makeup, it’s like doing your hair ... It’s not permanent. I’ve never had any kind of plastic surgery or anything like that. I think it’s each to their own, whatever makes you happy. It’s such a small thing for me."
In May, Jack was forced to defend his appearance, explaining that his time out of the spotlight taught him to face his insecurities head-on.
"I had an insecurity with my lips and I had the opportunity to not be insecure anymore and I did that and I'm happy," he told The Kyle & Jackie O Show.
Jack has since proved to be one of the most highly-coveted performers to come from The Voice.
The singer will be performing in Melbourne and Sydney throughout September and October and is reportedly recording new music.