I have about 4-6 weeks to lose some weight, advice?

i carry it all in my stomach. I also have what I call "arm-pit fat" that I want to get rid of. over-all I'm in shape because I do workout as often as I can. I have about 4-6 weeks to try and lose weight. my goal is anywhere in between 10-20 Lbs. my question is, what are the best ways to lose 10-20 lbs in 4-6 weeks? give me all you can think of from what to eat, how much to eat, what to do exercise wise, how many sets and reps, etc. please and thank you!
I have about 4-6 weeks to lose some weight, advice?
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