Alexa Chung shined in her silver ensemble which was a tad matchy matchy but still worked like magic for some reason. She appeared on the Jimmy Fallon show (on January 5th). Both of her standout pieces were from the Marc Jacobs SS12 collection. 
Alexa’s shoe is the Marc Jacobs “Runway Mary Jane Point Toe Pump” which is available at Saks for $645.
