15 Pounds in two weeks?
15 pounds * 3500 cals/pound = 52,500 cals
52,500/14 = 3,750 calories per day
If your body ****bolizes 2,000 calories per day and you eat 1200 calories [so your body doesn't go into starvation mode].
2000-cals - 1200 cals = 800 cals [****bolized weight loss]
3,750 cals - 800 cals ~ 3000-cals
If you only take in 1200 calories and aerobically burn 3000 calories a day for the next two weeks you will lose 15-lbs.
Obviously I am making a LOT of assumption about you, but see the list:
http://www.nutristrategy.com/activitylist3.htm
Your basically going to be doing aerobics all day long which will result in injury... I think your only hope is to lose as much fat as possible and cut water [the day of] This will probably leave you weak and your performance will be sub-par.
You should have started dieting 2-3 months ago.