What should i do before my school starts?

I dont think you need to lose weight at all, but if you want to, 2 weeks is nowhere near long enough, just eat healthily and exercise, maybe go for a 10 minute jog a few times a week, or if you cant jog for 10 mins start at 3 minutes and build up over a coupla weeks, the point is to be healthy, not super skinny. Maybe instead of having highlights (they'r expensive and really high maintanance) get a haircut, or you could dye your hair semi-permanantly to give you a change, that way you can change your hair colour when you like without being stuck with it. As for the tan, I think its better to be natural. And I completely agree with the second girl, DO NOT try and lose weight that way, if you really want to, just do it slowly.