BEST: Marion Cotillard looked simply chic at the New York premiere of Contagion, wearing a nude and black lace Christian Dior gown from the Fall 2011 collection.

WORST: She loves London, she loves France, we can see Tara Reid’s underpants! The wild newlywed was a trashy tourist in London, looking like she needed a shower and some clean clothes outside of her hotel.

BEST: Orange crush! Gwyneth Paltrow was dressed to thrill in a Lanvin wrap dress at the Coach & Gwyneth Paltrow Dinner Party in London. She finished off the color-happy looked with a Coach clutch and bright red peep-toe booties. The Contagion star rocked a houndstooth coat over the sexy dress to keep warm.

WORST: Kat Von D covered up her ink in tacky fashion, while out and about in NYC.

BEST: Sarah Jessica Parker looked colorful in the city, hitting the Late Show with David Letterman in a look from the Prabal Gurung Fall 2011 collection.

WORST: Khloe Kardashian was spotted out and about in NYC, showing off her curves in a catsuit that was snug in all the wrong places!

BEST: Dita Von Teese ravished at the premiere of God Save My Shoes, wearing an elegant Elie Saab dress from the Fall 2011 collection with Christian Louboutin heels and a Lulu Guinness Lip clutch.

WORST: Johnny Weir’s ensemble at the New York premiere of Contagon would have been totally cool – on a girl!

BEST: Olivia Munn looked pretty in a Valentino silk dress at the Contagion premiere in New York.

WORST: Haute habit? Daphe Guinness looked like a nun to honor Valentino Garavani with the 2011 Couture Council Award for Artistry of Fashion in NYC.