>> we are shopping for clothes because everything i have is way too big. >> reporter: the successful denver stockbroker once had to order these size 38 pants online. >> i can fit in one leg of the pants. >> reporter: three years ago this is what she looked like. she weighed, well. she has a confession to make. >> i used to say i weighed over 525 pounds. it was difficult to say i weighed close to 600 pounds. >> reporter: when she deep sided -- decided to take back her life shannon never turned back. ♪ she's a big warrior ♪ >> reporter: signing up for breast cancer walks in honor of her mother a breast cancer survivor. >> nice and smooth. >> reporter: for the last year. >> i got this. >> reporter: religiously working out every day, three days a week with personal trainer matt ellison. >> she got inspired to get into the gym and now become inspiring. >> reporter: you didn't use drugs. didn't have surgery. didn't do a weight loss plan or diet? >> no.