WORST: Leslie Bibb looked gorgeous in a sultry, black floorlength, which featured a cutout back and a plunging neckline. The only problem? Her dress was so sheer, that it showed off her thong! She paired the high-slit number with Christian Louboutin platforms.

BEST: Paris Hilton was a camouflage cutie in a military themed halter in Cannes.

BEST: Kate Hudson looked super sophisticated at The Almay Concert in NYC, paring a cream blouse with a black suit.

WORST: Orange platform sandals + white socks = an absolute no no. Debbie Harry sported the flawed look at The Almay Concert to Celebrate Rainforest Fund’s 21st Birthday in NYC.

BEST: Delta Goodrem looked super chic at the Australians In Film 2010 Breakthrough Awards in Los Angeles, wearing a peplum-style mini with black slingbacks.

WORST: Leigh Lezark’s wore colorful mini to Belvedere’s Vodka Pink Grapefruit launch party in NYC, which had WAY too much going on!

WORST: Ashley Olsen is a fashion designer? The uber-famous twin sported rather frumpy duds to Belvedere’s Vodka Pink Grapefruit launch party in NYC.

BEST: We love Kelly Osbourne’s psychedelic print gown! The rock royalty hit Belvedere’s Vodka Pink Grapefruit launch party in NYC in high style.

WORST: William H. Macy was almost unrecognizable in Los Angeles. Is he resurrecting his role in Boogie Nights, or something?

WORST: Taboo marched down the street in Milan, looking like one of Sgt. Pepper’s Lonely Hearts Club Band in a ridiculous jacket.

WORST: Sarah Jessica Parker was not looking Sexy in NYC, stepping out in a confusingly clashing ensemble.

WORST: Lady Gaga channeled Hannibal Lector with a scary mask at The Almay Concert to Celebrate Rainforest Fund’s 21st Birthday in NYC.

BEST: Eva Longoria Parker continued her Cannes style streak, shimmering in an intricately embellished Naeem Khan gown at the On Tour premiere.

WORST: Is that a shirt or a dress? Emma Roberts stepped out to the Paper Magazine and H&M party in Los Angeles, channeling Taylor Momsen’s racy style.

WORST: This dress was a little too sexy for our tastes! Alessandra Torresani was barely covered in a cutout LBD at a Paper Magazine and H&M party in Los Angeles.

WORST: Alexis Arquette was dripping in Pepto Bismol pink at Paper Magazine and H&M party in Los Angeles.

BEST: Helen Mirren modeled a nude Elie Saab stunner at the Chopard Trophy Party at Cannes. The Brit beauty was dripping in Chopard jewels.

WORST: Tanisha Thomas is a gorgeous gal, but we cannot figure out what she was thinking when she threw on these acid washed jeans and dizzyingly busy top for the Wildfox Fall 2010 Collection celebration party.

BEST: Karina Smirnoff looked super cute in denim at the Wildfox Fall 2010 Collection Celebration in NYC.