The 23-year-old Price Tag star spent the summer in plaster after falling off stage and breaking her foot, and was even forced to cancel tour dates with her girl crush Katy Perry.
While most of her fans were supportive, one took it to the extreme.
'One fan broke her ankle so she'd know how I feel,' Jessie told Fabulous magazine.
'That was weird. Another locked me in a toilet once and then started taking photos of me. I was like: 'Please let me wash my hands!' They do try and jump on your car and follow you into your hotel room and stuff.'
After undergoing a bone transplant in an effort to get her foot to mend itself, she has now been told that she might never be able to wear heels again.
'I cried when I was told that. Genuinely,' she said. 'I'm not the most curvaceous girl in the world and so heels make me feel sexy. And though I do love a trainer and a brothel creeper and a Dr Martens boot, there are times when you need a heel! What about my wedding day?! And when I go out I might not get into clubs because they'll say, 'Nah, she's wearing trainers!''