You can view Sam in her glitzy stand out crystal embellished dress here.
You can't buy Sam's dress online as unfortunately it is completely sold out but you can view it here on the ASOS website.
I have blogged about Sam's dress before, when Lucy Mecklenburgh wore it and Miley Cyrus wore the multicoloured version, and you can view these posts here & here.
Item image via Forever Unique.