[stars & stripes forever]

She is wearing a Greek Cross that happens to have a loop for the chain above it.

I beg to differ. CHELSEA is wearing an UPSIDE DOWN CROSS. This is a GREEK CROSS. NOT what she is wearing.

[Crusher138]

A Greek cross has four equal arms. The loop added at the top for the chain makes it look like an upside down cross. This is easier to see in clear pictures.