Speaking candidly during an Instagram live on Saturday, Olivia said she had recently got fillers under her eyes and in her cheeks as well as her lips.
She admitted she did it to feel better about her appearance, saying comments from trolls that she looked tired, sick, too skinny or too fat had an impact on her.
Olivia added she had never had fillers before and said she only got the bare minimum done.
"I may as well just, like, do whatever is gonna make me feel better," she said.
While she didn't reveal how much money she spent on her cosmetic procedures, she said it was "expensive".
Olivia was also open about her recent return to Australia, saying it was a "massive kick up the a**".
"In Australia, or like, especially on the Central Coast, it's like, people know that I'm there and if they see me and I think they recognise me like, 'Oh yeah, that's probably her', then they go ahead with the filthy looks and stuff like that," she said.
"It's just like I feel uncomfortable again, like I go to the shops and stuff [and people are] taking photos on the sly."
Olivia teases 'exciting' news
When a follower asked if she had any upcoming projects planned, Olivia revealed she had received an offer just yesterday, but could not expand on the details.
"I've actually got some very exciting things happening for myself," she said.
"I haven't signed on the dotted line yet, so I can't tell you and I hate to be that person.
"I got a really exciting offer yesterday, hence why [boyfriend Jackson Lonie] and I were celebrating. You will know soon.
"I have some really exciting things coming."
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