I have a slim body build, and have little fat around the navel area.
However, the thing that annoys me the most is the fat around my neck!
The fat that surrounds my neck is very stretchy, and when I lower or bend my head, it is very noticeable and you can see layers of fat which look extremely ugly (like a roly-poly dog)

. My
BMI is just over 16 (175cm and 50kg).
My question is, are there any special exercises/workouts which I can relatively easily do to reduce this neck fat (e.g. once a day??), without going into taking medications, etc...??? It seems that no amount of exercise can remove it... I regularly play tennis, do swimming, basketball and cross-country, but to no avail! I even tried to go on a diet but that didn't work either... Please help!!!
Thanks!!
p.s. If it helps, I am 16 years old.