How much mite i loose??

hiya, I want to loose some weight by xmas!
my plan is this:
Food -
morning: 1 and a half weetabix with semi skinned milk and some sugar on top or small serving of weetos

Lunch: small sandwich(maybe, I dont like them much), crisps(probably skips),...

fruit, carton of orange juice, cake

Dinner:A small portion of whatever we are having(make suggestions of healthy things we could have to mum), yogurt, fruit, water

Snacks:2 biscuits midmorning, small chocolate bar mid afternoon (like a penguin) or after dinner, flavoured water to drink.

Other - maybe a milkshake once a week, a few glasses of fizzy drinks, a chocolate bar once a week, and other occasional treats e.g. birthday cake

Excercise -
*walk to and from school everyday
* 4 hours of dance a week
*1 hour workout tape a day
*100 situps every night
*jumping jacks
*just dancing around my room every day
*1 hour bike ride at the weekend
*Two hours of pe at skl and dance rehearsel most lunchtimes
. just try and move around a lot if I can!

What do you think?? can I make any improvements to it??? And how much will I loose by christmas???( I am 5'2/3 and 13)
Any other advice? Other diets?

Thanx
xxx

Okay, I'm guessing you're in the UK because I don't totally understand some of your wording, but first of all, you are 13, don't worry about losing weight by christmas.

But to answer your actual question, the proposed diet seems relatively balanced...the secret to weight loss is not starving yourself, it is making the right choices. Starving yourself is a common mistake, if you DON'T eat enough calories each day, it actually slows down your metabolism.

From the exercise you're suggesting, it seems that you have a very active lifestyle with dance and everything. and with excercise you burn calories, but you have to eat some of those back, or you can end up with the same problem as not eating enough calories. It is the difference between Gross Calories (The total calories ate within a day) and Net Calories (the total calories ate minus the calories burned off through exercise, as well as every day living[walking, sitting, standing, etc.])

Find the right balance, and you will be able to accomplish your goal. Also note that it isn't healthy for your body to lose more than 1 lb a week, so don't go overboard or you can end up doing major damage to your body's systems and organs.