Its not that its a hard question.. Its that I think u are looking for a easy answer..
There isn't a workout.. Just simple ways to help make it happen
1)diet, losing weight always helps, drink more water also
2)do cardio along with ur workout plan
3)make sure u are doing high intensity work outs
4) there are some suplements that will help
Besides that there really in not a workout that will make it happen magically