More and more teenagers are including weight loss on their New Year wish list.
While many girls and boys still want 'to be punctual, to concentrate on school work and to stop procrastinating', losing weight is becoming increasingly important to them.
Sarah Yiu, 12, says she looks up to her elder sister, who is a fashion model.
'My sister is thin, fit and beautiful,' Sarah says. 'She works hard to stay in shape. To follow in her footsteps and become a model, I need to cut down on food and lose weight as quickly as I can.'
Sarah is 1.48 metres tall and weighs 36 kilograms. She's aiming to lose four to five kilograms.
'I know I will be underweight if I lose a few more pounds,' she says. 'However, we all grow during puberty. If I don't slim up now, the fat will accumulate and it will be hard for me to get rid of it a few years later. I need to prepare myself for my modelling career.'