WORST: Rihanna is known for her wacky onstage wardrobe, but the sassy singer looked like an inflated jailbird in her blowup getup.

WORST: Lil’ Kim was up to her old tricks at a Canadian nightclub, wearing her underwear as outerwear.

BEST: Jessica Alba was a divine Lady in Red at Paris Couture Fashion Week, hitting the Valentino party in powerfully ruffled gown from the designer’s Fall 2010 Collection.

BEST: Claire Danes looked anything but mellow in a yellow Valentino strapless. The actress wore the tiered chiffon Spring 2010 gown to the designer’s bash at Paris Couture Fashion Week.

WORST: Heather Mills stepped out in England wearing a putridly patterned summer dress. At least she matched the backdrop…

BEST: Serena Williams hit a grand slam at the 2010 Wimbledon Gala Dinner, rocking a white mini from the Burberry collection.

WORST: Kelis attempted to bring back such unfortunate 1990’s trends, such as the fanny pack and MC Hammer pants, while hopping on a flight in London.

WORST: Who needs an It Bag when you can just tote your belonging in your bra? Amy Winehouse showed off the multi-functionality of her corset, while out on the town in London.

BEST: Marion Cotillard looked totally EuroChic at the London premiere of Inception, wearing a vividly patterned Thakoon number from the Pre-Fall 2010 Collection with Dior cutout heels.

BEST: Leighton Meester was in Gossip-worthy getup style at the Chanel Couture fashion show, rocking an embroidered leather dress with a Chanel necklace and Christian Louboutin open-toed booties.

BEST: Jessica Alba stunned at the Chanel Fall 2010 Couture show in Paris, wearing an embroidered Spring 2010 Chanel mini, which she belted in red.

BEST: Blake Lively was in sizzling summer style at the Chanel Couture fashion show, wearing a delightfully pastel floral halter dress with peep-toed heels.

BEST: Reese Witherspoon was a Barney’s babe in Beverly Hills, spotted outside of the luxe department store rocking a geometric pattern mini with Christian Louboutin wedges and a Lanvin bag.

WORST: Dita von Teese stole the spotlight away from the rest of Jean Paul Gaultier’s couture collection when she stripped off her black gown, revealing this sequined, corseted contraption!

WORST: The view from behind was even more shocking!

BEST: Zoe Saldana was dressed in honorable attire at the Calvin Klein Berlin fashion show, wearing a pale mint one-shouldered mini from the designer’s collection, which she paired with edgy Resort 2011 heels.

BEST: Diane Kruger looked white haute in a Calvin Klein shift dress at the designer’s Berlin Fashion bash.

BEST: AnnaLynne McCord escorted her hunky beau Kellan Lutz to the World of Calvin Klein event in Berlin, showing off her bombshell body in a simply styled blue mini.