You here the talk about burning fat. This is a little misunderstood.
You don't per say BURN fat cells you burn the energy stored in the fat cell.
Think of a fat cell as a balloon. The more energy it stores the bigger it gets. When you (burn fat) you are burning the energy stored in the cell. This courses it to collapse and shrink. BUT it is still there.
However you can build new fat cells. So the key is to maintain a healthy weight to prevent the increase of fat cells.
The more fat cells build the harder it is to shed the layer, like the more flat balloons you have the more space they take up.
To actually loose fat you need liposuction.