Helena Christensen wore a Stella McCartney Spring 2012 dress for the Swarovski Model Search event in London. The printed dresses from this collection are hard to pull off so I'd say this is a good attempt by Helena.
The Dutch supermodel pretty much rocked this look, even the bright tights (the beige pumps I am going to ignore).
Image Sources: nymag.com/fashion, zimbio.com/pictures
