Kim Kardashian models 22-carat diamond ring in Chicago

October 19, 2010 7:55:41 PM PDT
Celebrity socialite Kim Kardashian modeled what is described as the ultimate engagement ring Tuesday night in Chicago. It's a 22-carat princess cut diamond ring.

Couples are competing in a series of online challenges with Michael Hill Jewelers. A panel of judges will pick a winning couple who will receive the ring.