Weight Loss For A Holiday in Vanuatu.. help?!

arakera

Hello, new here! My name is Arakera, and in mid-September I am going on a holiday to Vanuatu, and have decided I want to lose weight for it, so I can spend all my time in nice bikinis - right now, I am extremely self-conscious of my figure, and like everyone I'm sure, I would love to slim & tone up a bit. (quite a bit..)

I am 170m and currently weigh 66.5kg. My highest weight was 71.2kg, though I subconsciously lost 4 or so kg throughout last year by becoming more active. That's nice and all, but a little slow for my liking. I don't actually have a goal weight - I know that muscle weighs more than fat, so I'm not going to set myself one, I'd just like to lose a lot of body fat. I'm not sure of my exact body fat percentage currently which is no help at all, I know & apologise, but I look very similar to the 'before' / left photo here:
https://mediumredpotion.files.wordpress.com/2013/01/samebutdifferent.jpg?w=300&h=290
I'd like to look something like this:
http://33.media.tumblr.com/tumblr_m2ru76bR4o1rqawilo1_500.gif

I'm not going to kid myself into thinking I'll look exactly like that, seeing as all bodies are different and all, but my question is, is it possible for me to go from what I am to something similar to what I want to be in the time period of around 6 months?
If so, please let me know how! As in how much I should be eating, exercising, etc and what I should be eating and what kind of exercises, all that kind of thing- I am so new to all of this, and the people here seem pretty experienced with this stuff.

If not possible, if ridiculous or stupid, then I'd love it if you let me know and gave me an idea of what I could look like in six months if I put in a huge but realistic amount of effort for someone who works 6 hours a day, 7 days a week. (eg. exercising 40 mins in the morning & at night 5-6 times per week as opposed to exercising 5 hrs 7 days a week.. dumb example, but you get the idea I'm sure?) This could be completely ludicrous or it could be achievable, I'm not sure, you guys are the experienced ones and I'm here to listen and learn, rather than argue or strive for something impossible.

Thanks heaps! (:
- Arakera