We've got Haylie and Hilary Duff as...an aerobics queen and a goth gypsy? I dunno, your guess is as good as mine.
Here's Ryan "Pimp" Seacrest at the Playboy Mansion Halloween Party, with a Sexy Chef, but let me assure you, nothing was cooking in this situation.
Ron Jeremy came as a big penis, and naturally, had women swarming him. And let me tell you, blue hair and Chinese lettering tattoos are the sign of a classy gal.
Hef with his three girlfriends, also at the Playboy Mansion Halloween Party: a Tinkerbell, an old man wearing a robe, a Medusa, and a GoGo Dancer.
Pete Doherty in a red lace bra and brunette wig. Not one hundred percent sure he dressed up for Halloween on purpose.
Paris Hilton as Officer Naughty with, what she assured photographers, is a fake gun. You can always count on Paris to have a totally appropriate, completely demure costume for Halloween.
Lindsay Lohan also went as an aerobics queen, but I must point out, most aerobicizers don't wear heels. It's just not feasible. On the right is supposedly another costume she had, but I just think she wore her pj's out around Halloween, and the paparazzi assumed she had dressed up. Maybe she's on her way to Hef's party?
Finally, a real costume. Chris Klein and Ginnifer Goodwin from HBO's "Big Love" are dating? And going to costume parties together?