J. J. is wearing Marni shoes.
Here is a close-up of these shoes :
You can shop them at farfetch through Changing Room (UK) :
MARNI sling back sandal
With the same color palette (black/white/gold), you can also find at Net-a-porter these Two-tone suede sandals from the Marni fall winter 2012/13 runway show :
(runway picture credit : GoRunway.com)
The same runway shoes, but only in black and gold, might be shopped at My Theresa too :
PEEP-TOES WITH SCALLOPED PLATFORM