There's only so much you can burn off in two weeks without it becoming unhealthy. I'd strongly recommend intermittent fasting; it's a healthy method used by bodybuilders to cut excess fat without losing muscle. Basically you split the day into, let's say 16 hours and 8 hours. For 16 hours of the day you don't eat or drink anything other than water, and in the other 8 hours you have to eat all of the calories you need for that day.
To lose 1lbs per week you need to cut your daily calorie intake by 500. To lose 2 lbs of fat you need to cut your daily intake by 1,000 calories. I'd suggest cutting by 500 calories and just doing lots of cardio (i.e. going for runs every other day)
Use this calculator to see how many calories you need each day:
http://www.calculator.net/calorie-calculator.html
As for intermittent fasting, I'd suggest that you eat between the hours of 12pm and 8pm. Before 12 and after 8 you're not allowed to eat anything - if you do, it'll fuck it all up. Between 12 and 8 you need to get all of your daily calories and nutrients. Let's say that you're a 20 year old male, 5'10 and weigh 160lbs. In order to lose 1lb per week, you need to consume 1895~ calories. So between 12 in the afternoon and 8 and night you need to eat enough food to fulfil that. Cut saturated fats and other unhealthy foods from your diet, make sure that you eat plenty of vegetables and high protein foods (e.g. fish, meat, nuts). Avoid simple carbs, as found in white pasta, bread, white rice - replace these with complex carbs that are found in whole grain foods like brown rice, oats and wholegrain pasta.
I'd recommend drinking about a gallon of water a day (4.5 litres), rather than 2.5 litres, if you do intermittent fasting because it'll keep you feeling full and reduce the temptation to eat.
If you have an iPhone, a great way of motivating yourself and keeping track of your progress is to download an app called RunKeeper - it records the distance and routes of all the runs you do, then you can access them online and keep track of how many calories you've burnt, how far you've ran, your average pace etc. You can use it to set personal goals too, such as "Run a total of 50km by this date" or "Complete a 10km run" which makes progress much easier to track and gives you something to really aim for.
If you need more information then feel free to PM me, I hope this was helpful