WHAT SHE WORE
The actress hit the Cannes premiere of Biutiful
in May wearing a black sequin Balmain
design, a studded belt and diamond drop earrings from Chopard
. WHY WE LOVE IT Beckinsale
looked seductive but sophisticated in her bold-shouldered gown with a daring slit. An eye-catching belt cinched her waist and upped the drama. Click through for more of 2010's sexiest looks.