how to get flat abs in a week and lose weight overall?

i really want to get flat abs fast (less than a week) because i’m going to a really important wedding and i want to look amazing. i have a little stomach that i’ve been working for months, but the fat won’t melt off. i swim and run everyday, what can i do? is there a method to lose A LOT ALOT A LOT of weight fast and get flat abs super uber fast?