Well actually, a person can only have one "masterpiece", which, as we all know, is the work that an apprentice does in order to prove that he's learned his craft and can now be considered a "Master" of his trade. A "masterpiece" is not always a person's best work, as is the mis-informed belief.
P.S.- How do they do the eyes on those models? I've never done one, so I don't know.