<text>  A self-confessed fizzy drink and crisp addict who was heading for a heart attack has ditched the junk food to shed more than six stone in two years. Rebecca Demaurie, from Rednal, Birmingham, was drinking four litres of bubbles a day - equivalent to a dozen cans - and would eat up to 24 bags of crisps, too. But when the mother-of-four bought herself a full-length mirror and caught a glimpse of her 21st self, she was so horrified that she decided to join her local Slimming World club. Left: Rebecca Demaurie weighed 21 stone and was drinking four litres of bubbles a day - equivalent to a dozen cans - and would eat up to 24 bags of crisps; Right: She lost 6st 3lbs by ditching the junk food and drinks . Rebecca joined her local Slimming World club and two years on, the 36-year-old mother-of-four has been named Greatest Loser 2015 at her Frankley group . Two years on, the 36-year-old has been named Greatest Loser 2015 at her Frankley group after shedding 6st 3lbs. Rebecca said: I was a heart attack waiting to happen. I could hardly walk down the road without getting out of breath, and I started suffering heart palpitations. I would go to bed and not know if I was going to wake up again. It affected me a lot, and I felt like I didnt want to leave the house. One day, I had been in the bath and I went upstairs to get changed. I caught myself in a new full-length mirror we had in the bedroom, and I really didnt like what I saw. Rebecca piled on weight gradually over the course of ten years as she snacked constantly on crisps, cakes, chocolate and fizzy drinks. Left: When Rebecca caught a glimpse of her 21st self in February 2013 she was so horrified that she decided to join her local Slimming World club; Right: Rebecca showing her new slimmer figure . She would order takeaways three times a week, and cook pizzas and burgers, while also enjoying huge bowls of cereal. I would just fill my face with food, said Rebecca, who had a Body Mass Index of 46.5 when she started her diet in February 2013. But straight afterwards I would feel bad and depressed again. I wasnt even enjoying the food any more. The proud slimmer says: I can now actually run. It has been hard, but I feel so much better! Going to that first Slimming World class, I was absolutely petrified. I felt so ashamed. Now, Rebecca has ditched the junk food and cooks all her meals from scratch for all the family - and husband Alan has lost weight, too. Im so proud of my Slimming World certificates, she said. They sit pride of place on my mantelpiece. I still have another three stone to go, but I feel like I dont embarrass my daughter anymore. I can actually run, and I eat so many vegetables that I think Im going to turn into one. It has been hard, but I feel so much better! 