I have to spread the rep but linnealand is spot on her.
Kateline you need to work out why you feel the need to lose weight. How are you feeling? How is school/work going, how are you doing in your personal life? This desire to lose weight is a symptom of a problem you need to sort out at the root. Yeah you could lose all 10kg but you wouldn't feel any better and you would never be able to lose enough to make you happy. Don't go down that route. It's a waste of your life.
If these feelings continue seek professional help.
I think you'r beautiful with this +10 kg ... anyway,
when you loose 10kg in one week, it never be healthy, i mean forcing metabolism to work faster (drugs) and don't eat (pain) is more destructive than an operation... so i think the plastic surgery is the best option. After that, you will regain that weight because he/she cannot change your genetic, and so.. this should be another topic
Are you sure 22lbs in a week? That is possible but unhealthy... depending on her weight.