Chest Voice

I think everyone would agree the goal is to have an integrated seamless blend of registers from bottom to top. I would argue that all women mix chest voice in varying degrees in all parts of the voice, on the bottom it is mostly chest, and on the top mostly head, and dramatic sopranos carry some degree of chest all the way up to the high C. Nowadays it would be unthinkable however to use chest voice in a way that caused a distinct break in the voice. I have heard crossover singers use a sort of Broadway belt in the lower registers, to my ears it sounds absolutely horrible.