BEST: Emma Watson cast a style spell at the London premiere of Harry Potter and the Deathly Hallows Part 2, wearing an absolutely breathtaking Oscar de la Renta gown. For the afterparty, the 21-year-old changed into a dazzling Elie Saab Couture number and Giuseppe Zanotti peep-toes.

WORST: Forget about Pretty Reckless, Taylor Momsen was totally out of
control with her WAY too sexy a la mode during a performance in Madrid.

WORST: Fergie sported some unflattering poop pants in London.

BEST: Jennifer Aniston was dressed to thrill at her Hand and Footprint Ceremony in Hollywood, wearing a Prada frock with Gucci heels.

WORST: Catherine Zeta-Jones was dressed in frumpy fashion while vacationing in Majorca, but at least she matched her pooch!

BEST: Kate Middleton looked mellow during her visit in Calgary, wearing a
yellow Jenny Packham dress with LK Bennett pumps and a matching clutch. The
Duchess also rocked an Alice by Temperley blouse with Gold Sign bootcut
denim, cowboy boots and a Smithbilt cowboy hat at the Calgary Stampede.

BEST: Brit beauty Clemence Poesy looked absolutely elegant in Nina Ricci at
the London premiere of Harry Potter and the Deathly Hallows Part 2.

WACKY: Helena Bonham Carter was up to her old tricks at the London premiere of Harry Potter and the Deathly Hallows Part 2, wearing a wacky pink hat with her asymmetrical gown.

WORST: Avril Lavigne is gonna have to dress better than this if she wants
people to buy her Abbey Dawn clothing line!

BEST: Hilary Swank showed off her superior stems at the Hugo Boss Fashion
show during Mercedes-Benz Fashion Week in Berlin, modeling a sexy dress from
the designer’s collection.