The Week's Best Dressed: Jessica Alba, Eva Green & Jaime King At 'Sin City' Premiere

Last night was the LA premiere of Sin City, where Jessica Alba wore a strapless blue satin Zac Posen fitted dress with peplum detailing on the hip. Jaime Chung wore a black Versace gown with a thigh high slit with gold trim and asymettrical halter neckline. Their co-star Eva Green wore a green sheer lace belted Elie Saab gown.

On Monday night Rihanna went to Gossip Girl hotspot Butter, where she wore a bright pink Helmut Lang jersey dress with a thigh high slit and matching pink lips. She paired it with white lace up Louboutins, rose gold jewellery by Lynn Ban and a Balmain white and black striped clutch bag.

READ MORE: What the stars wore to V Festival this weekend

Chloe Moretz is still on her If I Stay promo tour, and on Monday night she attended the New York premiere in a cute floral Miu Miu dress with a shirt collar detailing. She kept it young with two strap metallic sandals and her hair swept back in a casual updo.

This year's brightest TV stars will hit the red carpet at the Emmy Awards on Monday evening. This weekend saw a warm up gig - the Creative Arts Emmy Awards - where Kate Mara hit the red carpet in a Christian Dior two-part dress with a wool yellow overlay with a cold-shoulder, thigh high slit and deep V, revealing a pale pink quilted dress underneath.

In other style news this weekend, Alexa Chung attended Grimmy's birthday at Shoreditch House in a floaty Burberry Prorsum dress with two dangerously high slits and a Charlotte Simone popsicle scarf thrown over her shoulder. Take a look through the gallery above to see the best dressers so far this week...

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