PHOTOS: Cruise Couture And Idol Attire In The Best & Worst

By Leah Ornstein

RadarOnline.com Style & Beauty Editor

From a swanky fashion show in the South of France to the streets of Beverly Hills, Hollywood's hottest stars were dressed to rock and shock in the best, worst & wackiest fashions and RadarOnline.com has all the photos in our daily feature.

Chanel kicked off the Cannes Film Festival with their annual Cruise fashion show, attracting the A-list likes of Blake Lively and Rachel Bilson.  The Gossip Girl scored the top style slot, rocking a sizzling hot sequin blazer with a micro-mini tulip skirt, while the former OC star was close behind in her Chanel Couture strapless top and leather short look. Both babes finished off their fab looks with Christian Louboutin heels.

Dude looks like a homeless! Steven Tyler left his lady clothes at home, stepping out in Beverly Hills in transient threads. The Aerosmith frontman may be an American Idol when it comes to his career, but not with his couture!

Keira Knightley was a Valentino vixen on The Daily Show with Jon Stewart, while Sarah Jessica Parker looked Sexy in the City in a powerful purple Halston gown at the Robin Hood Foundation Gala but what was up with her hair?

What other stars were dressed to rock and shock on Monday?  Click here to find out.