Swimsuit time!!!

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Help! Anybody have any ideas of the quickest way to slim down my stomach??? I would jus like to be able to wear some type of 2 piece swimsuit this summer. My belly has some extra skin and jiggly from when I had my son 2 years ago. Along with I've lost around 90 lbs since I had him. Any suggestions of some way to jumpstart my weight loss again would like to lose around 15 lbs before summer.