I just saw coverage of the Rodarte/Colette party on Refinery29, and this pillowcase was among the pictures. Design by Miranda July, Here You Will Dream of Endless Kissing. Sadly, it looks like it is already sold out. Colette, $88
*Edited to say that it doesn't look like this was a Colette design exclusive. After searching the internet, I found them at Third Drawer Down, for $65, and they ship worldwide.