Britney Spears and her parasitic conjoined twin.
My aunt was a nurse at the hospital where Britney Spears was born. Her public relations people have covered it up pretty well, but when she was born she had a small, deformed twin sister growing out of her shoulder. It was just a small head and a claw-like hand on a fleshy stalk. It was severely retarded, mute, and always trying to bite everything. Britney had to have it removed at the age of four, because it kept biting her so badly that her shirts would always be covered in blood. It turned out having the twin removed was the best thing to ever happen to her, because it's unlikely she'd be famous now if she still had it. She never talks about the twin in public, but if you look closely you can see scar tissue on her back from where it used to be, and where it used to bite her.