She broke down in tears onstage hours before Little Mix were forced to cancel two shows due to her mystery illness.
And Jesy Nelson has now been targeted by cruel Internet trolls, who repeatedly told the 24-year-old to 'go kill your f***ing self' and 'die now' on Friday morning.
One vile user made persistent remarks about the Black Magic singer's figure and health in the comments of her latest Instagram picture - much to the horror of Jesy's fans.
The commenter incensed Jesy's loyal supporters as they wrote: 'I hope you die son f***ing fat!'
The same user said: 'Idiot! Fat! Awful! Whale' and added: 'Kill yourself!'
The comments came hours after the Romford-born singer broke down on stage in floods of tears.
Delivering a speech on body confidence during their Dublin performance on Wednesday, the star was overcome with emotion and struggled to get her words out as she was caught on camera fighting back tears in a clip released by a fan on Twitter.
There's too many 16 year olds who spend their whole day trolling honestly if you have a troll account log off/delete it, it's not even cute .. like okay Kelsey Hilson was funny e.t.c but too many try hards telling people to kill themselves e.t.c it's cringe.
Edit: My deepest apologies. I thought the "LM" in the title meant Little Monster. Nobody deserves to be the subject of this online violence. I hope the best for Jesy and pray that she has the strength to persevere through this difficult time in her life.
Why should she have to? She's not overweight and she looks great. Why should the response to nasty, bitter, jealous people lambasting her weight be for her to diet? That's not ok.
It's sad that to this day people insult others by their appearance, something that they can't change and makes them different, I don't know what's the fascination with being skinny or with muscles, why should everybody look like that? Where's the diversity?