lower belly fat - skinny fat

I'm not overweight i am slightly underweight yet have a big pooch!
How do i get rid of it? I am currently doing this routine each night:
20 crunches
20 leg lifts
20 wall push ups
20 squats
40 oblique twists
20 bicycles
20 bicep lifts (with drinks bottles filled with stones and water)

Along with the february squat challenge!
this is me..

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How do i get rid of it without losing weight or muscle????

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