Olivia Palermo looked gorgeous wearing a black and white watercolor gown from the Valentino Spring 2010 collection at the Valentino Garavani Archives Dinner Party in Paris.

Camilla Belle wore a shorter, slate-gray version of the same dress at The Art Of Elysium's Third Annual Black Tie Charity Gala "Heaven" back in January.

Which style is the right way, and which one needs to hit the highway? You tell me in the comment section below.

Photos (left to right): Dave M. Benett/Getty Images; Frazer Harrison/Getty Images