It's a battle of the west coast heiress versus the east coast city hipster, but which society girl looked hottest on the red carpet?

The City star Erin Lucas was spotted out and about at an exclusive PEOPLE party in New York wearing this cool Bilingual Clothing dress.

Erin mixes downtown style with upper east side chic by wearing it with bold yellow gladiator heels and a quilted Chanel bag. She adds just a little bit of bling with a boho gold cuff and keeps her hair as immaculate and glossy as usual.

Paris Hilton was the first to wear the Bilingual Clothing dress and she goes all matchy-matchy with a gorgeous turquoise necklace and satin hairband.

We're not sure the shiny maroon handbag really goes with the outfit and can't imagine why she picked it out of all the others in her gigantic wardrobe.

Are you loving Erin's cool summery style, or Paris' polished peacock look? How would you wear this dress?