Petra Nemcova and Katrina Bowden Get Dressed Up

Petra Nemcova and Katrina Bowden were among the guests at Roberto Cavalli's star studded Halloween Ball in NYC last night.

The Devil's night fete was held at Cipriani 42nd Street to celebrate the expansion of Cavalli's own vodka brand, Roberto Cavalli Vodka.

"I make the vodka because I like having sexy times with the sexy ladies," the designer, who dressed as fellow clothier Karl Lagerfeld for the night, explained.

"The vodka is actually inspired from my fashion, but I hope the fashion isn't inspired from the vodka," he jokes, adding, "Though maybe I should drink more."

Gossip Girls

Enjoy the pictures of Petra, Katrina and friends at Cavalli's Cipriani party last night (October 31).