The mum-of-three admitted that she could previously drink up to eight cans of Coke a day - a habit which led her weight to rise to 14 stone.
'I really neglected myself and took no time for myself at all, and I didn't look after my fitness or my health,' the former actress, who now runs her own dance school, explains.
'I consumed a lot of sugar with sweets and chocolate. It just kept me going through the day when I'm really busy.'
'But the worst thing for me was cans of Coke. I'd have six to eight cans of Coke a day, which is terrible. You don't think about sugar in a drink. You think it's not that bad because it's liquid, but it's actually worse.'
In a typical day, Jennifer says she would reach for a can of fizzy drink for breakfast, followed by another can with sweets like jelly beans or a Mars bar for lunch.
'People can say they are a drug addict or an alcoholic but if you say you're addicted to sugar you get laughed at. But it's actually causing a greater problem for people and the NHS.'
'It was just really shocking and quite disturbing when you’re confronted with it and the consequences of it and what could happen.'
'The thing was, I wasn't even really eating a lot. I was just snacking on rubbish. I wasn't actually sitting down and eating pizza or a big roast. It was just wasted calories.'
Jennifer, pictured on new ITV show Sugar Free Farm, used to drink up to eight cans of cola a day
Jennifer, 32, managed to tackle her addiction to the sweet stuff by taking part in the new ITV show Sugar Free Farm, which follows a group of celebrities giving up sugar whilst living on a farm for two weeks to grow and enjoy their own fresh, healthy produce.
However, it wasn't an easy process, and her withdrawal symptoms were so debilitating that at one point, she needed medical attention.
'I got hit the hardest with withdrawal, as my sugar intake was the highest', she recalls.
'I was picking carrots on the farm and every time I bent down I felt like someone was standing on my eyeballs. I felt physically sick.'
'I had the worst headache I've ever, ever felt. If you've ever detoxed, take that feeling and times it by 10. We were detoxing from processed food, sugar, alcohol, everything.'
'My sugar was the highest intake out of everyone taking part, which was really disturbing. It made me feel quite sick actually.'
Jennifer, pictured in September 2015, is no stranger to a celebrity diet, but she's now lost more than a stone
Jennifer, who is married to boxer Rob Tickle, now says the lifestyle changes she learned have not only benefited her but her entire family.
'It's educated me about making the right choices as a wife and a mum. I've learnt more about cooking and looking after myself.'
'I've continued to lose weight since I left the farm. I've lost over a stone-and-a-half so far and I feel so much better about myself. I'm also making proper time for myself.'
She adds that there are now no fizzy drinks at all in the Tickle household.
'My intake of sugar has dropped by 90 per cent. I haven't eliminated it altogether but I've made massive changes.'
'It's definitely changing. When you lose a stone-and-a-half you feel better health-wise but I'm feeling better about myself physically now too.'