There is a great way to take people's attention away from the chin by camouflaging it, and that is choosing the right type of hairstyle. There are many short, medium, and long haircuts which can be chosen for reducing the visibility of the unwanted aspects of your round face.
Front straight bangs can make you look chic. It goes well with medium, long or short hair! 'Low-maintenance' is what people call this hairdo... Layered shag hairstyle is also a great way to hide that extra fat around your chin. Just avoid keeping the layers shorter around the chin area, else you will end up showing off your chin more!
Side partitions will give a puffed effect to your face, diverting the attention from your chin. The face will appear much longer!
Always try to keep your hair below the shoulder, so that the attention will be focused on the hairdo. If you have curly hair, maintain a longer length while trimming it.
While getting these hairstyles done, remember that ones which end right above the jawline would give a slimmer appearance to your face. Whichever hairdo you choose, ensure that it suits your personality and that you are comfortable enough to carry it.