38 year old Canadian actress Rachel McAdams is next on our list. Surely you recognize Hollywood’s “it girl” from her breathtaking roles in The Notebook, Mean Girls, Wedding Crashers, and Red Eye. During the 2011 Cannes Film Festival, McAdams stunned everybody and their mama with this Marchesa number.
Duh, of course the one and only, Blake Lively is on the list! At the 2014 Cannes Film Festival, Lively premiered this stunning Gucci gown and heads couldn’t stop spinning. Especially as her ever handsome and hilarious husband, Ryan Reynolds, was at her side. [Side note: this duo have the most adorable pair of daughters too!] Lively is best known for her role of Serena van der Woodsen in the drama series Gossip Girl.