United Kingdom, Feb. 24 -- Kristin Cavallari recently attended a "sketchy" and "secretive" party in Los Angeles.

The 39-year-old star has revealed that she attended an exclusive party on Valentine's Day, which required a "specific app just for the RSVP".

Speaking on her Let's Be Honest podcast, Kristin shared: "The dress code says, 'Wear white if you're single, pink if you're heartbroken, black if you're horny and nude if you're slutty'."

Kristin had to use a QR code and pass through a "checkpoint" in order to access the party.

The blonde beauty - who wore black leather trousers and a nude top to the party - recalled: "The energy was so sketchy. It felt like a drug den. It felt like hookers. I didn't see any drugs, it just felt like t...