
The Best-Dressed Stars This Week: 5/23/13

Alessandra Ambrosio kept it sexy in Cavalli in Cannes, while Emma Roberts partied it up in Camilla and Marc in the big apple—see who else topped our most stylish star list this week!
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1. Alessandra Ambrosio

In Roberto Cavalli at his Yacht Party in Cannes.
2. Emma Roberts

Wearing Camilla and Marc during her appearance at Glamour's presentation of These Girls at Joe's Pub in New York City.
3. Heather Graham

In Herve L. Leroux at The Hangover III LA premiere.
4. Jamie Chung
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Wearing Armani at The Hangover III LA premiere.
5. Lucy Hale

In a Halston bronze cut-out gown and Stuart Weitzman Metallic Pink Vixen Shoes at the 38th Annual Gracie Gala Awards in Beverly Hills, CA.
6. Rosario Dawson

Out and about in Cannes, Rosario rocked a pink Elie Saab peplum dress.
7. Jessica Alba

In Zuhair Murad at the Social Star Awards.