Chin woes!?

Ok my chin is a normal size so i dont need an implant but the indent , where the chin curves in is really deep so it makes my chin look small, is there any type of surgery can can be done? Can they like cut behide the lip inside the mouth so it doesnt curver in so more and looks more flat? Is there anything that can be done? Id like a chin like anglina jolee cas hers is flat (just giving an example) and how much would that cost? Thanks so much any help would be great!