Georgia Davis, once dubbed Britain's fattest teenager, is now half the size she used to be, say reports.
The 16-year-old was named fattest teenager in Britain after hitting 33st but she is now 14.6st lighter, courtesy the nine months she spent at a US weight-loss camp.
Davis says when returned home to the UK, her mother couldn't recognize her.
"I used to look at myself in the mirror and cry. Now I smile and say, 'Yeah, I like myself'," the Sun quoted her as saying.
"I like my face and the way my body is shaped. The world is my oyster and I feel I can achieve anything.
"My mum didn't recognize me at the airport. I had to run up and show her it was me, she just cried and cried," she added.
Davis took up two seats as she flew out to North Carolina's 3,600-pound-a-month Wellspring Academy under a special scholarship.
However, she sat in a single seat on her flight home to Aberdare, South Wales, at her new weight of 18.4st.
Davis, 5ft 6in, has even beaten her type 2 diabetes and her crippling aches and pains.