I need to lose 20 pounds in one month, how do I do it?

Yes it may be unhealthy but I want to actually work for it and not just starve myself. I have a pageant October 22 and I need to be ready for athletic wear. I sadly have abs under my fat and I want to burn the fat to show them. And I need tips for toning my arms.
I need to lose 20 pounds in one month, how do I do it?
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