Sara De Boer/Startraks

WHAT SHE WORE
The actress rocked the L.A. premiere of The Back-Up Plan in a single-sleeve Gianfranco Ferre dress, a studded Christian Louboutin clutch, Ferragamo peep-toes and Cartier diamonds

WHY WE LOVE IT
Jennifer Lopez showed her style savvy by reflecting the gleam of her silver dress with carats and carats of white diamonds. Overkill? Not at all—J. Lo wisely skipped a dress-distracting necklace in favor of sparkling bracelets and rings.