So I can't find an exact match for the dress because almost everything she wore in that video was vintage or retro couture. This dress seems to be a pretty standard vintage bombshell-cut, though. I could be thrown off by Marina's giant tiddies, but it very much looks like a bombshell or sweetheart neck.
I'm assuming this is for a performance of some kind so I tried to look for something on the affordable side. Amazon and eBay are good places to look for reasonably priced stuff you can later customize on your own so you don't look like an off-the-rack queen. This is the closest thing I could find under $30, and all you would need to do is some stoning, a DIY hem on the skirt, and cut the sleeves off.