While there isn't a cream that will slim down your cheeks, a quick in-office procedure can be done to remove the fat there. This can be done under local anesthesia so you are awake but not feeling any pain. Please consult with a board certified specialist who can assist you in achieving the results you seek.
Sadly, no. That type of fat reducing topical cream is an urban myth and does not currently exist. Micro-liposuction would be required to remove the excess fat from the face.