WORST: Just call Peaches Geldof the Mad Hatter!

BEST: America, the beautiful! The gorgeous Ugly Betty star looked fab at the Edinburgh Film Festival in an alice + olivia Tessa dress, which she paired with Giuseppe Zanotti peep-toed platform heels.

WORST: Anne Hathaway had us seeing red, dressed for winter as she dined with style icon Valentino in London.

BEST: Rachel Bilson rocked a fab ensemble from Zac Posen’s Resort 2010 Collection to co-host the Take No Prisoners party with THQ.

BEST: Jessica Lowndes looked ready to hit the tropics, spotted in London wearing a fun sundress.

BEST: Brooklyn Decker rocked leopard heels with Americans threads, in true supermodel style!

BEST: Diane Kruger looked super summery in a pastel colored 3.1 Phillip Lim romper, which she paired with a hot pink cardigan and Christian Louboutin wedges.

BEST: Nicole Richie looked super BohoGlam at an event in Sydney, Australia, pairing a scalloped sequin jacket with an LBD and Christian Louboutin booties.

WORST: Leona Lewis tried the grunge glam look, but it didn’t suit the gorgeous singer!

BEST: Tori Spelling rocked a purple and gold mini with muted gold Christian Louboutins for her NYC book party.

BEST: Sassy singer Kristine Elezaj looked pretty and put together at the NYC celebration of Bravo’s new series Double Exposure.

WORST: Pink looked like she stepped out of a western saloon, performing onstage in Belfast in booty-baring getup!

BEST: Elle Macpherson showed off her post-baby bod in a brightly colored tank, boyfriend-style trousers and black sandals.

WORST: Joan Collins wore an exaggerated version of the exaggerated shoulder look with an interesting white hat, white gloves, and well, lots of white to Ladies Day at Royal Ascot in England.

WORST: We loved Mischa Barton’s retro look from head to ankle, but weren’t crazy about her dude-inspired loafers.

BEST: Ashlee Simpson-Wentz left a Reebok event in the Hollywood Hills, looking summery in a patterned tank, denim duds and metallic sandals.

WORST: Kristin Chenoweth is multi-talented, but apparently the overachiever has a little work to do on the fashion front.

BEST: Emmy Rossum and Michelle Trachtenberg looked casually chic, getting their nails done and noshing on frozen yogurt in Beverly Hills.