Need ur help in many ways.?

hey m a school goin girl m over weight but last month i lost around 3 kgs cauz of my sports coaching..but it gonna end tomorrow cauz r tournment is der after 2 days..so i need ur help ... can u tell me how to loose weight around in 1 month ...but i cant do exersise n dieting cauz i don have tym..n so for exersing i don have tym..plz advise me some other ways to reduce my weight... i mainly wanna reduce my belly ,thigh,hip fat .... can i loose dat much weight before 15th september 2010... cauz it my b'day n i wanna look good in dos cute long dresses