Woman's or junior top

This is such a fun top! I wore it once to a Lady Gaga concert in Chicago a couple years ago. It's very sheer so you need a cami or something underneath. I wore a strapless black bra underneath and it was pretty sexy. The shoulders are gold chains so a bra with straps would take away from the look. Also, I can't find any tags on it or a size. Weird and I don't remember where I got it. I don't think Lady Gaga noticed me either even though I looked pretty cool--ha ha.