Fans of the reality star went wild for her transformation, with tens of users leaving supportive comments.
"So beautiful," one wrote, while another told Elizabeth her makeover "makes me wanna go dark!".
Lizzie's post comes days after she was spotted picking up a pregnancy test at a pharmacy in her hometown of Newcastle, New South Wales.
The jewellery store manager looked downcast and worried as she read the back of the packet and then took what appeared to be a tense phone call.
Since leaving the show, Elizabeth has made no mention that she is expecting or could be pregnant.