Does anyone know a book by this description....?

What I remember: The main character is a girl, whos name I forget. Her twin sister, whos name is Angel, died because of a E. Coli tainted hamburger. I remembers how she was all , 'Oh, why couldn't I have ordered the hamburger? Why did I take the hot dog?' or something along those lines. her age was 12-16, I'm not sure. The title may have had the word 'angel' in it.