Paris Hilton didn't disappoint this Halloween season! The heiress with killer bod and sexy style donned a bad-girl bunny costume in turquoise for Seth MacFarlane's annual bash and then for the yearly Playboy Mansion party.

And who helped her pick out this daring look? Her pup Prince Hilton, of course! Paris' adorable BFF accompanied her to Trashy Lingerie earlier in the day to choose the costume. The pair turned up in matching yellow, the teacup Pomeranian curled up in Paris' arms. We almost with Prince had a matching sexy bunny costume ... we'd love to see THAT!