What should I eat in order to lose weight? (17 yr female)?

I'm 5 foot 3 and I weigh around 105 pounds (BMI of 18.6) but I'm not happy with my body and I want to lose excess fat.

Would you be able to give me a rough idea of how many calories I should consume each day if I want to lose a significant amount of weight in 3 weeks?

My daily exercises:

30 mins of walking.
45 mins of dancing (rather energetic)
30 squats
30 lunges
As many bicycle sit-ups as I can manage.

Given my daily exercises, how many calories should I look to be consuming in order to noticeably lose weight (several pounds) and tone up?

Thank you.

Perfect Ways To Lose Weight

Recommanded Answer:
To reduce weight you have to restrict yourself form eating the following things Junk foods, Fast foods, Rice, Non-Veg items, Mango, Oily foods,Sweets, Potato. Another most important thing you have to restrict your self from eating after 5 pm. This means do not any thing after evening. You have to do exercise every day.

• Fish, nuts, apples, olives, white chicken & water. You should be working out way more than that.