Loose belly skin (get rid of)! Help!?

The summers coming! And I wanda we're a victoria secret bathing suit!!!! im now down to my regular size after having 2 kidz, 2 yrs ago by c-section, I weigh 110 now, but I have just a lil loose skin and my belly botton sucks, but ill fix that by a percing! Question is: how do I get rid of just a lil loose belly skin? How does exercise help skin bounce back to normal? I used to love my belly back in the day! It was my favorite body part! But now sucks! Sup help please! No surgery tho, I'm a por gurl lol!