Need to lose the last bit of weight...What can I do?

I have been told by friends to go and see a model agency. I sent some pics to two agenicies and they both told me to come for an interview. I did this more for fun to prove to my friends that I am no model. However, unexpected they wanted to see me.

I am 5,9 and weight 56/57 kg. My waist is 65 cm. I went on their websites to look at their models and they all have a waist of 60/61 cm.

What is there I can do to get those measurements within the next 2 months? As those are required? I workout 2 times a week and pretty much eat healty.

Since I am a student...I realized this may be a good opportunity to earn some money while studying.
Need to lose the last bit of weight...What can I do?
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