The 22-year-old Geordie Shore star shed three stone over four years, taking her from a size 16 to a size eight.
During an interview with the MailOnline, Holly thanked her online bullies for pushing her to get fit.
She said: "I don't want to say it's because of Twitter or anything like that but with all the comments I was getting, 90 per cent of them were about my weight and were commenting on how I was fat, or how I was ugly.
"To be honest I'd like to thank those people who called me those names. It did give me a little bit of a push, but nobody should lose weight because someone called them fat."
Speaking to Closer last year, Holly revealed the battle with her weight caused her to self harm.
She said: "I'm ashamed to say it, but I only stopped cutting myself when I was 16, when I was happier with myself."
Of her amazing transformation, Holly insisted it was down to hdd work and eating healthily.
She added: "It took me a year to lose weight and there's no secret to it – I ate less, cut down on fatty food and started moving more."
Holly joins co-star Charlotte Crosby who also recently showed off impressive weight loss.