This is from one of 2 six-pack sets available in the Retro Diva collection that recently became available. This set is called Get Down Tonight. Let's Groove is a black-based royal purple filled with mostly red shimmer. It applied perfectly in 2 coats and dried rather quickly. I made a bit of a mess with the application, but I'm going to be swatching and posting more of these throughout the day, so it's coming right off! I bought mine from Victoria Nail Supply and they may even show up at Sally Beauty. I did see a few of the Orly Once Upon A Time polishes there yesterday. Coming up in my next post from Retro Diva: Cords, which looks to be a silver-bronze, but I can't tell from the bottle if it's more metallic or more shimmer. Check back in a little while to find out!