It's that time again -- let's take a moment to gawk at some of the best and worst dressed celebs of the week.

Whether it's Mila Kunis stunning in an Alexander McQueen gown for one of the 'Oz the Great and Powerful' premieres or Rihanna raising eyebrows with doubled up jeans (if that's indeed what they were), there were several head-turning ensembles worthy of praise ... and dissection.

The Best:

Gawd, could Mila Kunis be any more gorgeous? It's not fair. With her sleek brown locks and strapless tiered Alexander McQueen gown, which was grayish and patterned, she was jaw-droppingly beautiful at the London premiere of her new film.

Mila Kunis Alexander McQueen London
Ian Gavan, Getty Images

At 46, Halle Berry is one hot mama. The actress turned up to the premiere of her new film 'The Call' (in which she sports hideous hair) wearing an asymmetrical, black leather Helmut Lang skirt paired with strappy heels and a gold chain belt.

Halle Berry Helmut Lang
Kevin Winter, Getty Images

Tina Fey took time out of her busy sched preparing for eternal life in hell (thanks to Taylor Swift) and knocked it out of the park at the New York 'Admission' premiere. She wore a leather peplum top and tweed pencil skirt, both by J. Mendel, and left her signature glasses at home. We love 'em, but it was a wise choice -- otherwise she might have looked too "naughty librarian."

Tina Fey J Mendel PeplumTweed Admissions
Mike Coppola, Getty Images

Rihanna makes two appearances on the list this week. At her River Island launch party in London, she donned one of the line's dresses, an extra clingy black frock with a slit and strappy ruby heels that matched her Bordeaux-stained lip look. Oh HAI Rihanna's leg!

Rihanna River Island
Stuart Wilson, Getty Images

The Worst:

And here's RiRi again, wearing what looks like a double pair of jeans with two waistlines in different denim washes. But it could just be an optical illusion, where one is sewn into the other, as opposed to two pairs of jeans. We dunno. It's a tough look to pull off and not even a fashion rule breaker like Rihanna succeeded.

Rihanna Double Jeans
Pacific Coast News

We love Abigail Breslin's bright blonde locks, but there is something about her black Alice + Olicia blazer-like blouse and high-waisted pants that seem off to us. That huge bow is distracting -- she's not a present, for God's sake. And it looks like too much belly skin is showing.

Abigail Breslin Alicia + Olivia
Frazer Harrison, Getty Images

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