The Best-Dressed Celebs This Week: 9/27/13

From Kate Beckinsale in Elie Saab to Selena Gomez in Versace—these are the most stylish stars this week!

Is anyone else getting a Greased Lightning vibe from Kate Hudson in a Michael Kors catsuit here? The actress channeled Sandy at the IHeartRadio Music Festival in an all-black ensemble.

Butterflies and a crop top moment? Shutting it down K Cav. Shutting. It. Down. The reality star-turned-designer was also sporting her 'Celestial' heels at her Kristin Cavallari by Chinese Laundry event in Texas.

Kate Beckinsale looked STUNNING in Elie Saab Haute Couture at the Qingdao Oriental Movie Metropolis.

Living for Mad Men star Kiernan Shipka in this color-blocked burgundy and nude DELPOZO dress at the Emmy Awards Performers Nominee Reception.

It just wouldn't be a normal week without a hot pic of Rosie Huntington-Whiteley killing it in a black leather mink skirt and fierce booties. Can we just be you??

Eva Longoria looked anything but desparate in an LBD and Salvatore Ferragamo pumps at the Padres Contra El Cancer 13th Annual "El Sueno De Esperanza Gala".

Lauren Conrad looked adorbs in florals at the launch event for her for lifestyle line with BlueAvocado.

The Catherine Malandrino for DesigNation collection launched at Kohl's today! Who's excited?? Padma Lakshmi is apparently already a fan of the goods—here she is out and about in LA wearing the Asymmetrical Striped Pullover Sweater.

This is what Selena Gomez wore to sit front row at the Versace show during Milan Fashion Week and I loved every second of it.

Kelly Osbourne hit a style high note in Sachin + Babi at Variety's 10 Brits to Watch event.