BEST: Katy Perry showed off her fab figure in a color-popping Zac Posen number at her Purr by Katy Perry for Nordstrom Pop-Up NYC Event.

WORST: Leah Remini clearly doesn’t care about how she looks in public. The actress left Jimmy Kimmel Live studios in purple slippers and a sweatshirt.

WORST: Bai Ling was up to her usual attire antics in Los Angeles, showing off her fat-free belly in tacky style.

BEST: Emma Watson was flying high on the fashion front, jazzing up her basic duds with a Burberry Prorsum studded handbag, Chanel ballet flats and classic Ray Ban Wayfarer shades.

BEST: Megan Fox looked sophisticated and chic in cuffed trousers and tight tank, while running errands in Los Angeles.

WORST: Rihanna wasn’t looking so sophisticated for The Late Show with David Letterman, wearing cutoffs over tights.

BEST: Anne Hathaway looked fem and fab in a Valentino mini from the Fall 2010 collection at the New York premiere of Love & Other Drugs.

BEST: Jessica White rocked a gorgeous lace mini to the NYC premiere of Love & Other Drugs.

BEST: LeeLee Sobieski hit the NYC premiere of Love & Other Drugs, jazzing up a sexy black mini with red heels.

BEST: Julie Benz looked powerful in purple at the Lupus LA 8th Annual Bag Ladies Luncheon in Los Angeles.

BEST: Toni Braxton looked chic in a black ensemble at the Lupus LA 8th
Annual Bag Ladies Luncheon in Los Angeles.

BEST: Kim Kardashian paired black leggings with a beige shirt and cropped blazer for a sexy but professional look, in NYC.

BEST: Olivia Palermo rocked a professional but chic Mango ensemble to the Mango Spring/Summer presentation in Madrid. Wearing a silk shirt tucked into beige slack, the style star belted the look in tan, adding her Mulberry bag.

BEST: Naomi Campbell was dressed to kill‹in kill! The testy supermodel
rocked a fur coat over a ruffly purple frock to the launch the Dennis Basso boutique at TSUM Department Store in Russia.

BEST: Audrina Patridge paid homage to Bob Dylan at the Sheryl Crow Breast Cancer Awareness Benefit in Los Angeles.

BEST: Amber Heard showed off her sexy bod at the Sloane-Kettering Cancer Center’s 2010 Fall Party in Los Angeles, pairing leather leggings with a lace top and fitted blazer.

WORST: Andie MacDowell had a lot going on with her housewife gone wild look at the WE Do Good Awards in NYC.

WORST: Ally Sheedy was dressed in frumpy fashion at the WE Do Good Awards in NYC.

BEST: Kelly Rutherford rocked a cool and structured black frock to the WE Do Good Awards in NYC.

WORST: Leighton Meester hit the Harry Winston Court of Jewels Recreation Launch, looking completely ridiculous in a lace Marchesa jumpsuit.