POP-UP MYSTERY What's Coming To 20th & Fifth On February 10th?

"Wait 'till you see what's about to pop up!" is what the door on the shop at the nortwest corner of Fifth Avenue and 20th Street says. Apparently it will be some sort of clothing boutique judging from the text on the window, but beyond that, we will all apparently have to wait a few weeks to see.

With all this mystery, though, it had better be good...