Hello out there! i am 5'7 140 pounds pot belly. How can i lose weight?

Please reply have any suggestions that work.I need to lose weight really fast. open to anything. Because i have a lot of muffin top I am huge. also do you know which exercises work best. is there a way i can make my butt get bigger not my stomach.
Update: please reply the people who anwsered say i dont sound fat butt i really do look fatt everyone tells me i gained a lot of weight. i weighed110 pounds 2 years ago
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