"Don't go into the light, Carol Anne," Lucy wrote, referencing the old horror movie Poltergeist.
A fan decided to reply to the pic, saying that straight men don't like girls that are as skinny as her and that she should eat a hamburger.
"@lucyhale No straight men are signing off on that anorexic look --that's for gay guys & fashionistas, we want you to please eat a hamburger."
Luckily, Lucy knows how to sass the hell out of a troll like this, totally calling him out for his disgusting comments.
"I am disgusted that a man would even think of saying these absolutely awful words to a woman. You should be ashamed of yourself."
"As someone who used to struggle with anorexia, I don't take these comments lightly. Im healthy and happy and you don't know me."
"So keep your repulsive comments to yourself."
"Just another insecure man hiding behind a computer screen. Boy BYE."
If you or someone you know needs help, you can speak confidentially to a trained counsellor 24 hours a day at headspace.org.au or Kids Helpline: 1800 55 1800.