Middleton partied before gun incident in Paris. (Indigo/Getty Images)Pippa Middleton is probably not so chipper now that police are investigating last Saturday's scary incident when one of her friends pointed what appeared to be a gun at a French photographer. But just hours before, the Duchess's younger sister was living it up at a lavish, yet raunchy Marie Antoinette-themed costume party in Paris — and video of the soiree has just hit the Web.
