"And then they sent it around trying to not let me find out but I did eventually."
Her weight also affected her own self-image.
She said: "When I looked in the mirror, I saw someone who needed help but didn't know how to ask for it.
"Someone who needed to change but didn't know how. I felt disgusted looking at myself.
"My turning point was when nothing would go my way.
"When the guys I liked didn't like me because of my appearance.
"When I wanted to be looked at as a normal person. When I wanted to be a healthy and happy version of myself."
In 2015, Crystal started a ketogenic diet that consisted of low carb and high protein.
Crystal one year ago, before losing 47kgs. Photo / Caters
Her weight loss was rapid and in 12 months she had lost 47kg, which changed her life.
She said: "A lot of people that didn't want to be my friend before because of my weight now pretend like we have always been friends, especially because of all the attention on my social media.
"And there has also been guys that used to tell me things like "I would never date someone like you" are now trying to talk to me and pretend like they never turned me down because of my weight.
"The way I see it is if a guy was never interested in me before than I would never be interested in them now. There's more to life than just looks."
She added: "I'm a whole different person.
"I feel more confident in myself. I don't feel tired or sluggish anymore. Everyday I have so much energy. I can do things I couldn't do before like run jump play a sport.
"I don't have to worry about not being able to do things like ride a roller coaster and not have the belt buckle.
"I cannot believe I came this far. It went by so fast that if I think about doing it again I don't think I could. I don't recognise myself."
Breakfast: A meal from Taco Bell which would usually be two tacos and fiesta potatoes
Lunch: two slices of pizza and hot Cheetos
Dinner: Usually a bowl from Chipotle or something fast food
Snacks: Three big bags of chips from the gas station
Dessert: I wasn't a big fan of desserts, my dessert would probably be more chips
DIET NOW: Breakfast: A slice of whole wheat toast, one egg, and one tangerine Lunch: 3.5 ounces of protein one cup of vegetables and half a cup of fruit Dinner: The same as my lunch 3 1/2 ounces of protein one cup of vegetables and a half a cup of fruit Snacks: protein snacks like string cheese and low-fat Greek yogurt Dessert: no dessert