BEST: Nikki Reed electrified at the New York screening of Breaking Dawn Part 1, in a neon green Michael Kors cutout gown that featured a sexy slit up to her thigh.

WORST: Shenae Grimes really, really needs to throw out these high-waisted and ill-fitting acid wash shorts. The 90210 star wore them AGAIN to the T-Mobile and Google Party for Google Music n Los Angeles.

BEST: Ashley Greene looked super edgy at the New York screening of Breaking Dawn Part 1, wearing a custom-designed Donna Karan one-sleeved cutout gown that showed off her hot bod to perfection.

WORST: Leave it to Snooki to match her hair streaks to her wild leopard booties!

BEST: Zoe Saldana brightened up the night in a marigold Michael Kors dress and accessories from the chic designer’s collection at his Robertson Boulevard boutique opening in support of the St. Jude Children’s Research Hospital.

WORST: Lady Gaga was definitely impossible not to notice wearing a color-blocked Roksanda Ilincic gown (braless!) with Christian Louboutin heels and a sperm styled Philip Treacy hat.

BEST: Minka Kelly rocked a fitted, gold leather trimmed Michael Kors dress with Brian Atwood heels to the Michael Kors Robertson Boulevard boutique opening in support of the St. Jude Children’s Research Hospital.

WORST: Kourtney Kardashian looked a little too corporate for a book signing event.

BEST: Kristen Stewart rocked a glam goth Roberto Cavalli gown to the Breaking Dawn premiere in London, finishing the look off with an Alexander McQueen belt and Jimmy Choo heels.

WORST: Jessica Szohr looked like she was wearing a nightie with tights in NYC.