Need Help With Missing Shiny Outfit in Get Famous

This is the outfit you're talking about. This is the first time I've seen it and I currently don't have any sims that I've played with who have reached level 10 in the acting career. This is the only sim in my game who has access to the outfit, not sure if it's because she's a mermaid? But, she's not in the acting career. My other sims don't have access to it. It's a two piece outfit.