Carlin's admission was prompted by a game of "question box" during the cocktail party, where Angie Kent took the lead in asking the anonymous questions written by the other contestants.
"Carlin," Angie began. "Have you had any physical modifications?"
Obviously nervous to answer the question, Carlin took a deep breath and revealed, "So, after I got my separation, everything was at an all-time low... like, my confidence. And I got my lips done."
The remaining Bachelorette contenders, Jackson Garlick, Ryan Anderson, Alex Mckay, Timm Hanly, and Matt Whyatt were just as shocked as Angie, laughing in response.
In usual Timm fashion, he made a joke out of it. "You got your lips done? Shut the gate. You are kidding. Carlin walking around like a duck?"
"I can't even see his lips. I'd get a refund after that!" Jackson joked.
Carlin's fillers do seem to have dissolved since he initially got them done, however Angie swooped in to save his feelings by also admitting that she has had her lips done in the past.
But Carlin isn't the only contestant on the show to have had cosmetic work done.
Fan-favourite Ciarran Stott who had a shock exit last week admitted to Angie during a one-on-one that he had a nose job.
"Well, I had a nose job last year. I was propper self-conscious about it," he candidly revealed.
"So I got it all trimmed down and looking nice and schmick... the ladies love it now."
"Well it's a nice looking nose now," Angie said as Cirarran than joked: "Well it should be for the money that I paid for it."